Mitt Romney today is headed to his lakeside retreat in Wolfeboro, N.H., on Friday for a three-day weekend, and all signs point to the GOP presidential nominee hunkering down to mull his shortlist for running mates.

Time is running short for Romney to make his selection in advance of the Republican convention in late August. Moreover, Romney is headed to London for the Summer Olympics, which begin July 27, followed by a trip to Israel, his first overseas foray as the presumptive nominee. That’s just two weeks away. If he remains abroad for a couple of weeks, that doesn’t leave much time before the Aug. 27 convention opens in Tampa, Fla.