"Dead Presidents" is a Marvel NOW! storyline, and the first storyline in the new Deadpool series. "Dead Presidents" is succeeded by Soul Hunter.
In this story, a former S.H.I.E.L.D. agent ressurects every dead president, from George Washington to Ronald Reagan, and the zombies unexpectedly want to destroy America. It's up to Deadpool, who's got the reputation, skills and plausible deniability - along with being Canadian - to stop the com-monsters in chief.