As pressure mounted last year on US President Barack Obama to take a stand on an issue - gay marriage - on which he was still famously 'evolving,' it was his vice president who gave him the nudge he needed.
Joe Biden went on NBC's Meet the Press and expressed his personal support for same-sex marriage. Just days later, Obama did the same in an interview with ABC News.
'A lot of people criticized me for speaking out, not long ago, about gay marriage. I could not remain silent any more,' Biden said on Sunday (15 September) at a political fundraiser in Iowa.