After a gaffe-filled week, Vice President Joseph R. Biden will go back on the campaign trail next week with visits to three relatively "safe" Democratic states. Mr. Biden will travel on Tuesday for campaign events in Minnesota, where President Obama leads presumptive Republican nominee Mitt Romney by an average of 10.5 percentage points in the Real Clear Politics average of polls.

On Wednesday, the vice president will campaign in Michigan, where the Democratic ticket is ahead by an average of 7.7 points. And on Friday, Mr. Biden and his wife, Jill, will attend campaign events in New York state, where Mr. Obama leads Mr. Romney by an average of 25.5 percentage points.