WASHINGTON — A few hours before President Obama offered his historic endorsement of same-sex marriage on Wednesday, Vice President Joseph R. Biden Jr. apologized to the president in the Oval Office for forcing Mr. Obama’s hand by airing his own views three days earlier, several people briefed on the exchange said on Thursday.
It was easily the biggest instance of crossed wires between the garrulous vice president and his more button-down boss, in an administration that has been marked by occasional eruptions by Mr. Biden. And its effect was magnified both because it involved a fraught social issue and because it came just as the general election campaign is heating up.