Incumbent Republicans have been running on “Washington DC is terrible and everyone there is a horrible crook” messaging for decades, their voters “know” it’s not them the song is talking about (“know” in quotes because there’s no textual basis for that belief and the literal lyrics of the song taken out of context could be describing Mitch McConnell or whoever, but Republicans have never let pesky facts get in the way of a good hate and they’re not about to start here)