I do think if Baker wanted it, he probably could take down Warren. Other than some Far Left voters, (who are pretty hard for any Republican to please) he didn't do much to offend most Massachusetts voters. There was some heat from the populist Right toward to end of his tenure, but I think that has mostly dwindled down. They've lost credibility with Diehl's 2 losses and with Jim Lyons not being party chairman any longer. I do think he would have survived the primary had he ran for a 3rd term in much the way Mike DeWine survived in Ohio. Far Right populists were loud and annoyed about COVID policy and some other issues, but at the end of the day, they'd still rather win and keep the seat out of Democratic hands. Warren's issues are still a bit fresh in people's minds. Her vanity run for President got her 3rd place even in Massachusetts, and sometimes being in the national spotlight isn't always a good thing. She could still win against Baker. Weld was popular in '96 and still lost to Kerry, but Baker is probably the best chance for Republicans to unseat Warren. There isn't many other options I think they would have who'd compare in Name ID, approval rating, or cash to do it.

Yeah, Baker's the obvious choice the the GOP here, if he's willing. But I'm still rather surprised to see Elizabeth Warren polling like Rick Santorum in 2006, when matched against him.

If Warren is worried: "I would not vote for Mitch McConnell to be my leader."

With a data set that can generate this type of result against Warren I'm impressed by how popular rent control still is.