Democrats will retain control of the Senate for the next two years, but if Republicans win the House, a split Congress could cause legislative gridlock for the rest of Biden's time in office.
Senate Majority Leader Chuck Schumer promised on Saturday that the Senate would continue to confirm Biden's nominees for federal judgeships at a steady clip.
If the upper chamber stays divided, Democrats will still face hurdles in getting judicial nominees confirmed because committees will likely have equal numbers of Democrats and Republicans, meaning some GOP support will be required.
If a Supreme Court seat becomes vacant, Democrats will be able to approve Biden's pick with a simple majority vote.
Senate confirmation is required for about 1,200 government roles, including cabinet officials and ambassadors, and while the Senate has confirmed 465 Biden nominees thus far according to the Washington Post and the partnership for public service.
If Republicans gain majority control in the House, it will be harder to pass legislation because the Senate may refuse to sign off on bills passed by a GOP majority.
Raising the debt ceiling is likely to be difficult if Republicans win the House and Democrats retain control of the Senate.
Some investigations are already underway, including a Hunter Biden probe, but Republicans had floated the idea of renewing investigations into Biden and his family.
The party that controls the house. The Republicans are seven wins away from securing the 218 seats needed for a majority as of Sunday morning. Democrats will need to win 14 of the 20 uncalled House races if they want to keep control of the House.
In the Nevada and Arizona Senate races that were called for Democrats on Friday and Saturday, the Democrats promised to work across the aisle in an appeal to right-leaning swing voters. NBC News reported that Cortez Masto highlighted her work with Sen. Chuck Grassley on the campaign trail.
The Georgia Senate race will go to a second election on December 6 after both candidates failed to get the necessary 50% of the vote. Democrats will hold 51 seats, meaning they won't need Vice President Harris to break a tie in the event of a split. Even if one Senate Democrat votes no, Democrats would still be able to pass legislation and confirm nominees.
There is an error in the number 84. The Senate has confirmed many of Biden's judicial nominees. The Senate approved more than 200 judges.
Democrats retain Senate as Nevada re-elects.
Senate control makes it easier for Democrats to get more judges.