This week on "Face the Nation with Margaret Brennan," Sens. Bernie Sanders and John Kennedy join, along with U.S. Ambassador to the United Nations Mike Waltz and former FDA Commissioner Scott Gottlieb. Plus, CBS News' Anthony Salvanto has the latest poll results.

This week on "Face the Nation with Margaret Brennan," Sens. Bernie Sanders and John Kennedy join, along with U.S. Ambassador to the United Nations Mike Waltz and former FDA Commissioner Scott Gottlieb. Plus, CBS News' Anthony Salvanto has the latest poll results.