Their goal: to argue that Trump couldn't possibly testify because he was incapable of telling the truth.
"He just made something up. That's his nature," Dowd said to Mueller.
Cohen: "What would you need in the region to sleep well at night?"
Trump: "I wouldn't need a f---ing thing, And I'd sleep like a baby."
Trump leaves.
Tillerson: "He's a f---ing moron."