Deadline reports that Maggie Gyllenhaal has come aboard White House Down, which stars Channing Tatum as the agent tasked with saving President Jamie Foxx after 1600 Penn is compromised. She’ll play the “female lead,†so get to speculating on who that is. Channing’s love interest? The first lady? The leader of a shady cabal of Williamsburg terrorists? (Boo … Variety says she’s just a Secret Service agent.)