Move comes days after Rubio won support of pro-LGBT donor
2016 hopeful speaks before LGBT group in South Carolina
2016 hopeful says constitutional amendment came up in 'private discussions'
2016 hopeful urges Republicans to look where Paul Singer is 'coming from'
Paul Singer calls 2016 hopeful an 'exceptional candidate'
2016 hopeful set to address Iowa Safe Schools event
Says opponents of same-sex marriage shouldn't be called homophobes
2016 hopeful says Vermont needed to cool down after civil unions
Sanders accuses Clinton of rewriting history on DOMA
Vermont senator suggests Clinton trying to 'rewrite history'