What happens to JD Vance's Senate seat and others in Congress selected to join the Trump administration

Washington — President-elect Donald Trump is returning to the White House next year after a decisive victory in the 2024 election. And he's slated to bring with him a number of lawmakers to round out his administration — from Sen. JD Vance as vice president-elect to Rep. Elise Stefanik as his pick for ambassador to the U.N.

With the moves, the lawmakers will have to vacate their seats after the start of the new Congress in January, teeing up the process to replace them. The process differs between the two chambers, and between states. 

Here's how the vacancies will be filled: