Tonight on Amanpour and Company: An exclusive interview with Zohrab Mnatsakanyan, Armenian Minister of Foreign Affairs; Sarah Longwell, Founder, Republican Voters Against Trump & John Fetterman, Democratic Pennsylvania Lt. Governor; Ivo Daalder, Former U.S. Ambassador to NATO. Hari Sreenivasan interviews Sean Trende, Sr. Elections Analyst, RealClearPolitics.