Mitt Romney might not approve this message. Celebrities are weighing in with their endorsements of the candidates. Last week, Lena Dunham starred in a spot from the Obama campaign but Mitt Romney will not be outdone. And so, another breakout star of the summer has stepped forward to endorse the candidate. Joss Whedon released this video explaining why he has turned his back on the president in favor of Gov. Romney. He's really the only candidate whose cold attitude and shortsighted policies can usher in the zombie apocalypse. As Whedon points out, "[Mitt's] not afraid to face a ravening, grasping horde of subhumans because that's how he sees poor people already." That's really the type of leader we need when Hell is full and the dead walk the Earth.