Trump Faces Fight for Control of Congress as Democrats Eye Investigations and Legislative Roadblocks

President Donald Trump’s ability to carry out his agenda during the final two years of his presidency hangs in the balance Tuesday as Americans vote in midterm elections that could either strengthen Republican control of Washington or hand Democrats the congressional power to obstruct his policies and investigate his administration.

With Republicans defending narrow majorities in both the House and Senate, the election could dramatically alter the political landscape. A Republican victory would give Trump additional leverage to advance his priorities on immigration, taxes, trade and national security, while a Democrat takeover of either chamber could significantly complicate his plans.

Republicans entered the election holding a 218-214 advantage in the House and a 53-47 majority in the Senate, according to Reuters. Democrats would need a net gain of four seats in either chamber to secure control.

Although several national surveys have indicated that Democrats are positioned to gain House seats, Republicans remain hopeful that strong turnout among Trump supporters will produce a better result than polling suggests. The president’s allies have pointed to previous elections in which surveys underestimated Republican support.

Trump has devoted considerable attention to the midterms, urging his supporters to approach the election as though he were personally seeking another term.

“You have to pretend I’m on the ballot because when I’m on the ballot, we get almost 50% more voters out,” Trump told supporters during a Monday telephone rally, according to CBS News.

The president described Tuesday’s voting as “the most important midterm election in the history of our country,” arguing that Republican success would preserve the momentum of his administration.

Trump also acknowledged that the president’s party has traditionally struggled in midterm contests, although he maintained that Republicans had mounted an unusually aggressive campaign.

“For some reason, the sitting president doesn’t win the midterms,” Trump said Monday, according to CBS News. “But we gave this a very strong shot.”

A Republican victory in both chambers would allow Trump to portray the outcome as a public endorsement of his America First policies, particularly given the historical tendency of voters to punish the party controlling the White House during midterm elections.

Continued GOP control would also make it easier for the administration to pursue additional tax legislation, immigration measures, changes to federal spending and healthcare policy, and the confirmation of judicial and executive branch nominees.

An analysis by S&P Global Market Intelligence suggested that Republican majorities would give the White House greater freedom to advance tax reductions, immigration restrictions and trade initiatives while limiting congressional resistance to the administration’s priorities.

Republican control of the Senate would be especially important for Trump’s judicial appointments, including any potential Supreme Court vacancy during the remainder of his presidency.

Democrats, meanwhile, have focused their campaign on the cost of living, economic concerns and the war with Iran, hoping dissatisfaction with the administration will translate into congressional gains.

Election analysts have generally viewed the House as the Democrats’ stronger opportunity, while several closely contested Senate races could determine whether Republicans retain their advantage in the upper chamber.

Nevertheless, Republican strategists argue that polling may not fully capture the strength of Trump’s political coalition, particularly among rural and working-class voters who have sometimes been underrepresented in surveys.

Republican pollster Patrick Ruffini has pointed to previous Senate contests in Iowa, Michigan and Ohio, where polling during the 2018 through 2024 election cycles overstated Democratic support by an average of 6.2 percentage points. Other polling experts have cautioned that predicting turnout in midterm elections is especially difficult because participation tends to be lower than in presidential years.

More than 57 million Americans had already voted before Election Day, according to figures cited by Reuters, exceeding the approximately 46 million early votes cast in the 2022 midterms. The election is also on pace to become the most expensive in American history, with candidates and outside organizations expected to spend approximately $11.9 billion.