Vice President Joseph R. Biden gave an election-year pep talk to House Democrats Friday, saying their political prospects in the fall will look brighter than they do right now. “Between now and November is three political lifetimes,” Mr. Biden said at the Democrats’ annual retreat on Maryland’s Eastern Shore. “I can’t imagine our prospects being viewed by the press and everyone else as being a whole hell of a lot brighter by the time we turn to September than now.” Mr. Biden said “even with all the difficulties you’re facing now with the [Affordable Care Act], 55 percent of the...