I believe the best defense is go after Representatives and, yes, Senators with recall elections when the fringe anti-populist agenda items rear their ugly heads. I might be wrong, but I don’t think a successful recall attempt could be run against Puerto Rican statehood or DC statehood. DC statehood is probably “none of my business” for most voters, and Puerto Rico enlarges our country. (These things also likely enlarge our debt too, but look at where we are).
These guys are going to overreach, and when they try to shove really unpopular legislation down the voters throats, that is when I believe we can push back and win.
You’ll need a constitutional amendment to do recalls. There have already been several court cases testing recall and the answer is constitutional amendment.