- Donald Trump's formal arraignment in Manhattan criminal court sent House Republicans into a tizzy.
- GOP leaders are rushing to scuttle state prosecutors from ever digging into presidential affairs.
- "These set precedents," a former GOP lawmaker told Insider. "And the guardrails continue to erode."
House Republicans rushing to derail Manhattan District Attorney Alvin Bragg's case against Trump is a stab at the separation of powers that they may live to regret, oversight veterans told Insider.