President Barack ObamaBarack ObamaPerez: Trump climate order helps ‘the worst polluters’ Ash Carter accepts Harvard professorship Groups worry as Trump weighs wider role in Yemen fight MORE officially tapped his second in command, Vice President Joe BidenJoe BidenSenate about to enter 'nuclear option' death spiral Biden: I regret not being president Biden: 'McCain is right: Need select committee' for Russia MORE, to oversee the implementation of the $787 economic stimulus package on Monday.

Obama told the nation's governors Monday morning that he has asked Biden to "keep things on track."