Virginia Heffernan talks to Slate's Dahlia Lithwick about her working theory – nobody really knows what a constitutional crisis is. Also, have the Republican's finally found the line they won't let Trump cross?Slate Plus members, stick around after the show to hear Virginia Heffernan chat with John Di Domenico, our voice of Donald Trump, about how he has come to love the character he plays and listen to him debut his Anthony Scaramucci impression! "It's uncanny, you won't even believe it's not him." [Heavy on the Italian accent].Learn more about your ad choices. Visit megaphone.fm/adchoices