Well, the president's personal attorney and fixer just went on the record under oath about multiple crimes Trump committed.... and the GOP appeared to have basically no questions about any of them whatsoever. Instead they had one singular mission, and this about sums it up (paraphrasing):
GOP: "You lied to Congress! Lying lying liar!"
Cohen: "Umm, yes, that's a big part of why I'm now here and also facing jail time. I lied *for Trump*.
GOP: "You did unethical things!!!!"
Cohen: "Yep.... once again.... under the employ of Trump... did many unethical things. You get what a "fixer" is right? Why I'm here... "
GOP: "LIAR LIAR PANTS ON FIRE!!!!!"
***Cohen: "One more time... yes I lied to Congress to hide Trump's crimes. Got caught. Now going to jail. Whole reason I'm here testifying...
GOP: "Well obviously since you are a liar Trump is innocent. No further questions!"
Entire population of the planet who are in possession of functioning brain cells: ***(This line an exact quote from hearing. No I am not kidding)
As is clear to basically everyone, the GOP doesn't care that Cohen lied to Congress to hide Trump's transgressions.
They care that he STOPPED lying when he got caught, and flipped. THAT is what has them enraged.