This was done because Pelosi led Kevin to believe the rats would protect him but they didn’t. The republicans have not suddenly gotten a spine, they are bitter because the rats didn’t save Rino Kevin.
"Your eyes are full of hate, forty-one. That's good. Hate keeps a man alive. It gives him strength." - Quintus Arrius, Ben Hur
(I know it doesn't mesh with the tagline, just an observation that bitterness can be the beginning of a spine.)