Playbook: “Republicans have done a good job during this process projecting confidence in their mastery of the situation, and their ability to deliver for the president.”

“But as of late Sunday, our GOP sources said they could not predict what was going to happen now with witnesses, and the Republican Conference lunch today will be key in determining the state of play. In other words, these top-level sources were allowing that things may have changed. We have yet to see if Republicans will brush off this new development, or whether it will push enough of them to vote for witnesses.”

“Bolton is not Lev Parnas or one of these other characters who has sprouted up in the Trump era. He’s a through-and-through conservative who was so far to the right that George W. Bush had to wait for recess to make him his U.N. envoy. He’s known to members of the Senate.”

“Here’s the dilemma for Republicans now: If you’re one of the Republicans who were already uncomfortable with this president, how do you vote to not call Bolton after seeing this? Remember: Bolton is publishing an entire book, and so far we know only what he’s said on Ukraine — not everything else he’s seen.”