New shake-ups in the Trump Administration, the head of U.S. Customs and Border Protection is out, and a new White House Press Secretary is in.

A Democratic family feud erupts over emergency spending for the border. Some liberals argue giving the President billions for detention centers will institutionalize a system they see as inhumane.

Plus, President Trump again warns Iran that any further attacks on American assets would be met with overwhelming force. The strong tweets come after Iran's president said his country won't negotiate with a White House it says is -- quote -- "afflicted by a mental disability."

And debate week for the 2020 Democrats. CNN is told that as he prepares, Joe Biden is studying how Bernie Sanders sparred with Hillary Clinton in 2016.

Today's Panel: CNN's Abby Phillip, Michael Shear with The New York Times, POLITICO's Heather Caygle, and Tarini Parti with The Wall Street Journal.

Also on the Program: CNN's Manu Raju, Barbara Starr, Kate Bennett and Evan Perez. via Knit