Maybe it's an indication of the high stakes in Tuesday's Pennsylvania primary. Or maybe they just want to actually see each other on the campaign trail.
Whatever the case, it's interesting to note that both the Clintons and the Obamas are making unusual joint appearances today.
Hillary and Bill Clinton are both at a rally in Pittsburgh this afternoon, and are scheduled to be joined by daughter Chelsea for another event tonight at the University of Pennsylvania in Philadelphia to wrap up their primary-eve campaigning.
Barack and Michelle Obama are to be together at two events tonight, one a town hall meeting in McKeesport and the other a rally at the University of Pittsburgh's basketball arena.
In recent weeks, the couples have campaigned separately so they can cover more ground and pitch more voters.
About Political Intelligence
Glen Johnson is Politics Editor at boston.com and lead blogger for "Political Intelligence." He moved to Massachusetts in the fourth grade, and has covered local, state, and national politics for over 25 years. E-mail him at email@example.com. Follow him on Twitter @globeglen.