After weeks and months of speculation about whom Mitt Romney will tap to be his vice presidential running mate, the presumptive GOP nominee will unveil his pick on Saturday morning in Norfolk, Va.

Romney’s campaign released a media advisory just after 11 p.m. tonight announcing that the news would come as the former Massachusetts governor kicks off of his bus tour.

“On Saturday, Mitt Romney will begin his ‘The Romney Plan For A Stronger Middle Class’ bus tour by announcing his choice for Vice Presidential candidate in Norfolk, Virginia,” the release said.

The event is at the USS Wisconsin, which is fueling speculation that the pick may be Wisconsin Rep. Paul Ryan, the chairman of the House Budget Committee.

The other most prominent name on Romney’s short list is Sen. Rob Portman (R-Ohio).