Hot trailer: 'House of Cards' Season 4

United, they stood. Separated...well, it appears the Underwoods are now at war. With each other. "You don't value what we have achieved," we hear recent SAG-winner Kevin Spacey, as President Underwood, growl at Claire over new footage from Season 4 of House of Cards. "We had a future until you started destroying it." Please enjoy this 40-second, rapid-fire preview of politico selfies, machine guns, hospitals, sex and attempted murder. House of Cards is back on Netflix March 4.