Further evidence for this exists in the demise of ticket splitting: if you vote R at the top of the ticket, you're very likely to vote R the rest of the way down the ticket, regardless of who the downballot R's are. It wasn't always this way, but has been for some time.

Some States even have a single box you can check to vote entirely for that party’s candidates, “straight ticket voting”.

Texas removed it a few years back and it’s removal was challenged (and lost) by Democrats: https://www.texastribune.org/2020/09/30/texas-2020-election-...