What changes if Democrats win a majority in Congress?

Democrats are hoping to flip the majority in Congress on November 3, boosted in part by US President Donald Trump’s low approval rating, concerns over the cost of living and the war with Iran. A win in either the House of Representatives or Senate would allow Democrats to rein in Trump for the remainder of his term, given that the US Constitution grants the legislature certain powers to keep the executive branch in check. What could change if Democrats take power in the House of Representatives Taking control of the lower house would give Democrats several tools to fight Trump, as it controls budgetary initiatives and Congress’s primary investigative body, the House Committee on oversight. Legislation to increase tax revenue also starts in the House of Representatives. With a majority, Democrats would assume the chairmanships of all congressional committees, which oversee the drafting of legislation for their respective jurisdictions – notably the influential agriculture and armed services committees. Chairmen also have the unilateral power to launch investigations and subpoena witnesses, powers the Democrats could use to compel government officials, political allies or Trump assoc...