As mayor of South Bend, Indiana, Pete Buttigieg has had a working relationship with the state’s former Governor, now Vice President, Mike Pence. But the VP’s STAND ON LGBTQ issues has become a target of the openly gay presidential candidate. This “Headliners” takes a look at the presidential hopeful as he looks to take on the White House. Sunday at 10 P.M. EST on MSNBC.