First Read lays out today's VP happenings:

With 19 days until the Dem convention and 26 days until the GOP one, today is a very big day for veep watchers. Obama stumps with Evan Bayh in Elkhart, IN; Michelle Obama attends a fundraiser with Tim Kaine in Norfolk, VA (after she visits with military families there); Tim Pawlenty already spoke at GOPAC's State and Local Summit in Arlington, VA and later addresses the National Press Club; and Kathleen Sebelius speaks at an Obama fundraiser in Leelanau County, MI. Whew.

What we will know by tomorrow at the latest is the timing of Obama's announcement. If it doesn't happen today -- and there's no reason to expect it will, unless Obama and Bayh have something planned for today -- then it almost certainly won't happen until after Obama returns from vacation after next week. Famous last words, right?