This week on "Face the Nation with Margaret Brennan," as Secretary of State Rubio and other administration officials meet with European allies in Geneva about the administration's 28-point plan to end the war in Ukraine, Ukrainian Ambassador to the U.S. Olga Stefanishyna and U.S. Sen. Rand Paul join. Plus, Sen. Mark Kelly and Rep. Jason Crow, two of the Democrats who President Trump accused of "seditious behavior," join.