As Ireland becomes the first country to put marriage equality to a popular vote, a widely cited study on how best to change people's minds on the issue comes under fire.May 22, 2015
UP NEXT
Donny Deutsch: How dare you Donald Trump tell me what it means to be a good Jew
03:54
'This is antisemitic garbage': Joe reacts to Trump's comments about Jewish Democrats
12:45
Lawrence: Trump wants your fear. Don’t give it to him.
11:25
Putin flexes expansionist muscles as GOP stalling starves Ukraine of military aid
04:25
David Rothkopf: Netanyahu has made the wrong political & military calculus
03:36
Weissmann: What Jack Smith should do after Judge Cannon’s ‘nutty’ order