President Trump is endorsing Rep. Julia Letlow (R-LA), a potential primary challenger to sitting Louisiana Senator Bill Cassidy (R-LA). Letlow has yet to officially announce she's running. MS NOW Capitol Hill Reporter Kevin Fry has the latest details. Mark McKinnon, former advisor to President George W. Bush, and former Rep. Susan Wild (D-PA) join Chris Jansing with their analysis on Trump’s endorsement. MS NOW: My Source for News, Opinion, and the World. Same mission. New name. » Subscribe to