President Donald Trump’s weakening approval ratings and voter dissatisfaction with the economy have made Republican control of Congress increasingly vulnerable less than two months before the November 3 midterm elections. Democrats are expanding the Senate map beyond their original targets, while Republicans still benefit from favorable state geography, fundraising and the historical advantage of the president’s party losing House seats in most midterms. The contest is projected to generate more than $3.4 billion in Senate advertising, up from an earlier $2.8 billion estimate. Democrats need four Republican-held Senate seats to win the majority. Their initial path centered on Michigan, Georgia, New Hampshire, Alaska, Maine, North Carolina and Ohio, but Texas and Iowa have become more competitive as Michigan and Maine grow less certain. Trump’s approval on handling the economy fell to 32% in an AP-NORC poll in July from 40% in March 2025, with tariffs, fuel costs and broader affordability concerns weighing on voters. Republicans hold a 218-214 House advantage and could gain from redrawn maps, while a Democratic Senate would give the party greater power over Trump’s nominees and court vacancies. Trump plans to campaign heavily during the final 30 days, but Republican candidates acknowledge that economic concerns and dissatisfaction among groups such as farmers and ranchers remain serious risks.