U.S. Representatives Steny Hoyer and Jerrold Nadler are retiring in January, but they are passing the torch to former aides who won the Democratic primaries to replace them.

The Senate race in Iowa is one of the most closely watched this year and the general election matchup is now set, with Democrats hoping for a gain.

Montana voters will select nominees in Tuesday’s state primary to replace two prominent Republican incumbents: U.S. Sen. Steve Daines and U.S. Rep. Ryan Zinke.

Republican U.S. Sen. Steve Daines of Montana has dropped his bid for reelection to a third term.