
Whether Donald Trump or Joe Biden gets sworn in as president in January, the composition of the Senate will shape what they can accomplish.
Republicans and Democrats have settled into the final weeks of a high-stakes fight for two years of Senate control. The party that wins a majority will not only dictate what policies the president can pass — on issues from health care to taxes and climate change — but also play a role in who he puts on federal courts.
The GOP holds a 53-47 advantage in the Senate. The party has to defend 23 seats this year, compared with 12 for Democrats. To gain control of the chamber, Democrats need to flip a net three seats if Biden wins (or four if he loses).