New Mexico Rep. Ben Ray Luján announced Monday (video) that he will run for U.S. Senate in 2020. The seat is being vacated by fellow Democratic Sen. Tom Udall, who is retiring.  Luján will seek to replicate the 2008 election, where he won his current job as then Rep. Udall departed to seek the U.S. Senate seat.

Luján is the 4th ranking Democrat in the U.S. House.  His safely Democratic 3rd district covers much of the northern half of the state. Luján won a 6th term by 32% last November, while Hillary Clinton won here by 15% over Donald Trump in 2016.

Five current House members have indicated they won't seek reelection in 2020. In Alabama, GOP Rep. Bradley Byrne is looking to challenge Democratic Sen. Doug Jones. Rob Woodall (R, GA-7), Jose Serrano (D, NY-15), and Rob Bishop (R, UT-1) are retiring. Aside from GA-7 - which gave us 2018's closest congressional race - all these seats appear safe for the incumbent party.