Assuming Jim Justice wins in West Virginia, the Senate GOP now only needs to gain one more seat — or none at all, depending on the presidential race — to take the majority.

Highlights: Mitch McConnell and Senate Republicans worked for more than a year to make Joe Manchin’s retirement announcement on Thursday a reality. And for good reason: The Democrat’s decision puts Republicans on the precipice of a majority that’s eluded them for two straight election cycles.

McConnell himself laid the groundwork last fall when he flew out to see the popular Gov. Jim Justice (R-W.Va.), the GOP leader said in an interview. McConnell said Justice initially seemed like he had never considered it, but a few months later, Justice launched his bid.

“You can do the math. If we don’t lose any incumbent — and I don’t think we will — he’s No. 50. And one step closer to having a majority,” McConnell said of Justice. “I’ve been involved in a lot of recruiting over the years, some successfully, some not. But I think that’s the best recruiting job I ever did.”