On Tuesday this publication laid out what happens if Democrats win both chambers in November. This piece covers the likelier outcome. By the forecasters’ current numbers, Democrats are favored to take the House, and the Senate remains a coin flip that requires them to win at least two states the president carried by double digits. If Texas and Ohio hold for Republicans, the country gets a Democratic House and a Republican Senate. That is a smaller result than a wave, and it is also the one result for which there is a complete, recent, documented precedent, because it is exactly what happened in 2018. A Democratic House sat across from Donald Trump and a Republican Senate for two years, from January 2019 to January 2021. Almost every question about what a House-only majority can do has already been answered once, by the same president, with many of the same people.
What follows is that record, applied to 2027, with an honest estimate of what is different this time. Where I am guessing, I say so.
The morning after
On November 7, 2018, the day after Republicans lost the House and gained two Senate seats, the president fired Attorney General Jeff Sessions. It is the most reliable single prediction available about this scenario, because the configuration was identical: the House gone, the Senate held, and a president who needed someone to blame and a way to change the subject by lunchtime. The likeliest candidate this time is Pete Hegseth. Thomas Massie’s articles of impeachment against him over the Iran war are filed and waiting, a Democratic House will take them up early, and a president who wants to deny the new majority its first target removes him before they can.
What does not happen in this scenario is the rush to the Supreme Court. If Republicans keep the Senate, Samuel Alito, who told CBS last Friday that retirement is “something I think that somebody at my age has to think about every term,” has no reason to announce in November. He can wait for a summer retirement and a Republican Senate in 2027, the way Anthony Kennedy announced in June 2018 and had Brett Kavanaugh seated by October. A Democratic House has no role in confirmations. The courts keep filling at the rate they have, and that is the single largest thing a House-only result leaves untouched.
The war decision, which the president has publicly scheduled for after the election, arrives in the lame duck either way. In this version he makes it knowing that the next Senate is his, which is a different calculation from the one in Tuesday’s piece and probably a freer one.
January: Speaker Jeffries and the purse
On January 3, 2027, Hakeem Jeffries becomes Speaker and Democrats take every House committee chair. That is the whole of the new power, and it divides into three instruments: money, subpoenas, and impeachment. The record of 2019 shows exactly how far each one reaches.
Money reaches furthest. Every spending bill has to pass the House, and a Speaker who will not bring a bill to the floor can stop it. The Republican Senate cannot force the House’s hand, and the president cannot spend money Congress has not appropriated, at least not lawfully. In December 2018, a month after losing the House and before the new Democratic majority was even sworn in, the president refused to sign funding bills without $5.7 billion for his wall and shut the government for 35 days, the longest shutdown in the country’s history. It ended on January 25, 2019, with the government reopened and no wall money. The House had won the fight with nothing but the power to say no.
Then came the workaround, and it is the move to expect again. On February 15, 2019, three weeks after losing the shutdown, the president declared a national emergency and moved billions from military construction to the wall without congressional approval. The House voted to terminate the emergency on February 26. The Republican Senate joined it on March 14, by 59 to 41, with twelve Republicans voting yes. The president vetoed the resolution the next day, his first veto, and the override failed. The money moved. The courts spent the rest of the term arguing about it.
That sequence is the template for 2027. The fight will be over the war, and the vehicle will be the $67.1 billion supplemental appropriation and the $2 billion to $3 billion a month the war is costing. A Democratic House can refuse to fund it. The president can declare an emergency and reprogram money from elsewhere in the Pentagon, as he did for the wall. A Republican Senate with a few defectors can pass a resolution against it, and the president can veto that resolution, as he did in 2019. The House can stop new money. It cannot stop the president from spending old money, and a Republican Senate makes the override arithmetic impossible.
The war, specifically
There is a closer precedent than the wall, and it involves Iran. In January 2020, after the president ordered the killing of Qassem Soleimani, Congress took up a war powers resolution directing him to end hostilities with Iran absent congressional authorization. The Republican Senate passed it on February 13, 2020, by 55 to 45, with eight Republicans voting yes. The Democratic House passed it in March. The president vetoed it in May, and the Senate override failed, 49 to 44.
So even a Republican Senate has, once, voted to restrain this president on Iran. The current Senate rejected a resolution to end the war 47 to 50 in April, with Susan Collins and Rand Paul the only Republicans in favor. If the November map costs Republicans a seat or two while leaving them the majority, a resolution might pass the Senate next spring, and on the 2020 precedent it would then be vetoed and the veto would stand. A House-only result produces a congressional statement against the war, probably, and no congressional end to it. The power of the purse remains the only instrument that operates without the president’s signature, and it only reaches new money.
The subpoenas, which take years
The Democratic committee chairs will have their list on January 3: the Epstein files and the Justice Department’s handling of them, the Signal strike plans, the FBI’s hiring-portal breach, the campaign ad paid for out of Customs and Border Protection’s budget, the DIA director fired over an Iran assessment, the overseas-ballot checkbox deleted under an emergency, Howard Lutnick’s account of his Epstein contacts, the Justice Department’s review of whether Richard Nixon was framed.
The 2019 record on what happens next is discouraging. In April 2019 the president said, “We’re fighting all the subpoenas,” and he did. The House Judiciary Committee subpoenaed Don McGahn, the former White House counsel, that month. McGahn testified, behind closed doors, in June 2021, after the president had left office. The House’s subpoena for the president’s financial records from his accounting firm reached the Supreme Court, which in July 2020 sent it back down with a new four-part test in Trump v. Mazars; the committee finally received the records in 2022. A House-only majority gets its documents, eventually, on a schedule the courts set and the committee cannot hurry, and the administration has spent seven years learning how to use that schedule.
What surfaced in 2019 surfaced from people: officials who left and testified, inspectors general who wrote reports, a whistleblower who filed a complaint. Expect the same. The most important witnesses in 2027 will be the ones who have already been fired, which in this administration is a long list, beginning, perhaps, with the secretary of war.
Impeachment, and the Mayorkas precedent
In December 2019, eleven months into the Democratic House, the president was impeached over the Ukraine call. The Republican Senate held a trial in which it voted 51 to 49, on January 31, 2020, against calling any witnesses, and acquitted him five days later. Mitt Romney was the only Republican to vote to convict on either article. The trial lasted less than three weeks.
That is what a House-only impeachment looks like: a vote in the House, a short trial on the Senate majority’s terms, and an acquittal. Hakeem Jeffries said in September, “We haven’t ruled anything out,” and “we haven’t ruled anything in.” The president said in Durant, Oklahoma, last week, “If we don’t win, they’ll end up impeaching me.” He may well be right about the House, and the 2020 record says he would be right about the outcome too.
Cabinet impeachments are worse in this scenario, and Republicans wrote the reason. In February 2024 the Republican House impeached Homeland Security Secretary Alejandro Mayorkas by a single vote. When the articles reached the Democratic Senate that April, it dismissed both on points of order, along party lines, without a trial. That precedent now belongs to a Republican Senate majority. A Democratic House can impeach Hegseth, Robert F. Kennedy Jr., or the acting attorney general, and a Republican Senate can dismiss the articles in an afternoon, citing the Democrats’ own 2024 votes. The televised cabinet trials that a Democratic Senate could run, which were the strongest instrument in Tuesday’s piece, do not happen here.
What the president does
The record is the guide, and the record of 2019 is that a loss of the House changed the president’s tactics while his direction held. He governed by emergency when Congress refused money. He vetoed what the Senate passed against him. He fought every subpoena. He declared the investigations a hoax and campaigned on them. In January 2026 he told Reuters that “when you think of it, we shouldn’t even have an election,” and a House-only loss gives him a version of the result to call illegitimate without a full defeat to explain: the Senate held, which proves the voters were with him, and the House fell, which proves the House was stolen. Expect both sentences, often, from November 4 on.
The difference this time is that he cannot run again, and a House-only result does less to change that than a full loss would. In 2019 the House majority was the opening act of his reelection campaign, and he treated it as one. In 2027 it is an obstacle with no election at the end of it for him personally, which removes the one restraint that 2020 imposed. A president who is not facing voters again and still has a Senate has fewer reasons to bargain with a House he cannot use.
What the Republicans do
Here the 2018 precedent is the most important, and it runs against Democrats’ hopes. After losing forty House seats in 2018, the Republican Party moved toward Trump. The members who lost were disproportionately the moderates in suburban districts; the ones who survived were the most loyal. The House Republican conference of 2019 was smaller and more Trump-aligned than the one before it, and a year later it voted unanimously against both articles of impeachment. A House loss purged the party’s center.
Expect the same in 2027. The thirty-six House Republicans who declined to run this year were, many of them, the members least comfortable with the president, and their seats are the likeliest to flip. A Republican Senate that held Texas and Ohio will credit the president’s late campaigning for the hold, and the senators who distanced themselves from the war this fall will have less reason to keep doing it once the election is behind them. A House-only result, on the 2018 evidence, strengthens the president’s grip on his party in the short run, even as it weakens his hold on the government.
The 2028 contest begins anyway, because nothing changes the president’s ineligibility to run again. The question is only how loudly. In a full Democratic Congress, the succession fight starts the next morning. In this scenario it starts more quietly, among people who still need the president’s endorsement and a Senate he still leads in practice.
What does not happen
No confirmations are stopped; the Senate keeps confirming judges and, if a vacancy comes, a justice. No cabinet trial is held; the articles are dismissed. No conviction. No law passes that the Senate leader opposes, and no override of any veto. No end to the war by resolution. No prosecution, because the Justice Department remains the president’s and the immunity decision of 2024 covers the official acts the committees will investigate.
What it adds up to
A House-only majority is, on the record of the one time it has happened to this president, a brake with a single pedal. It controls new money and it can make a public record. It cannot stop a judge, try a secretary, end a war, or pass a law, and it cannot prevent the president from moving money he already has.
That is less than the people who say “bloodbath” are hoping for, and it is more than nothing, and the difference is visible in the 2019 record. The 35-day shutdown ended with no wall money. The emergency declaration was voted down by twelve Republican senators before it was vetoed. The Iran war powers resolution passed a Republican Senate. The Ukraine call reached the public because a House committee could compel a whistleblower complaint to Congress. None of those things would have happened without a Democratic House, and none of them stopped the president from doing what he did next.
The honest summary for a reader deciding whether November matters: a Democratic House makes the president’s next two years more expensive and more public, and it does almost nothing to make them shorter. A Democratic Senate is the difference between a record and a reckoning, and it is still, today, a coin flip that will be decided in Texas and Ohio. The people who vote in those two states will decide which of this publication’s two pieces this week turns out to be the useful one.
Summary: if the Democrats take only the house, very little will change. Maybe some small symbolic victories, but nothing of substance. trump will be mostly free to continue to be corrupt and destructive.