New York (CNN Business) A version of this article first appeared in the "Reliable Sources" newsletter. You can sign up for free right here.

"This means war"

Don't take it from me — take it from Fox's Laura Ingraham — she says Tuesday's letter from White House counsel Pat Cipollone to congressional Democrats is a declaration of war by Trump. "This means war," she said Tuesday night.

The NYT is framing it the same way: "White House Declares War on Impeachment Inquiry" is the top headline on NYTimes.com right now. And in Wednesday's paper, the headline says "VOWING DEFIANCE, WHITE HOUSE SAYS INQUIRY IS INVALID."

"Well here we are," Chris Hayes said at the start of his MSNBC show Tuesday night. "The White House is now openly defying Congress's power to investigate the president for high crimes and misdemeanors."