During the Republican primary season, Mitt Romney strongly criticized President Obama's "failed leadership" on Afghanistan and support for a timetable to end the war. But those views are putting him at odds with an increasing chunk of the voters he will need to win the White House in November.

According to a Pew poll released on Wednesday, 59 percent of swing voters now favor a "rapid U.S. troop withdrawal." The survey defined swing voters as those who are either undecided between Romney and President Obama or may still change their minds.