If Romney, Grassley and Gardner (or just two of them) decides to join Murkowski and Collins, there won't be a replacement until January.
This is getting interesting.
Key GOP senator says she opposes taking up a Supreme Court nomination before Election Day
Republican Sen. Lisa Murkowski said Sunday that she opposes taking up a Supreme Court nomination prior to Election Day, becoming the second GOP senator this weekend to voice opposition to Senate movement on the matter before the 2020 election.www.cnn.com
Well, you got the most obvious two. Maybe Romney just because he hates Trump. Then the sledding gets difficult. And you're assuming no one in the Democrat party flips. Manchin and some in the west are a definite possiblity.
Anyway, you got the two most useless Republicans who always capitulate to the Democrats and never get anything back in return for it ever. If anyone had said "name two," it would have been those two. It's pathetic