Wyoming’s Senate primary pits a veteran Congress member against a party activist

On Tuesday, Republican primary voters will effectively choose their state’s next US senator.

Sen. Mike Enzi, the four-term Republican incumbent who’s served as chair of the Senate Budget Committee since 2015, is retiring. He and the state’s junior senator, John Barrasso, have both endorsed former Rep. Cynthia Lummis for the seat.

Lummis held Wyoming’s one and only House seat from 2009 to 2017, when she retired (Liz Cheney, daughter of former Vice President and Wyoming Rep. Dick Cheney, holds the seat currently). She has strong support from establishment groups like the Chamber of Commerce and President Donald Trump, and from more grassroots conservative organizations.