China retaliates against U.S. tariff hikes with tariffs of its own and the markets drop. President Trump says all will be fine, but many of his fellow Republicans are nervous because of the election calendar.

Plus Joe Biden makes his first 2020 campaign stop in New Hampshire this hour -- as the frontrunner.

And the President who refuses to cooperate with Congressional investigations says it is the Democrats who are causing a Constitutional crisis. His Attorney General calls it something different.

Today's Panel: CNN's Kaitlan Collins, Toluse Olorunnipa and Matt Viser with The Washington Post, and POLITICO's Heather Caygle

Also on the Program: CNN's Sunlen Serfaty, Aaron David Miller, and Arlette Saenz via Knit