Later this month, Hillary Clinton will host a fundraiser in Tobey Maguire’s house, the day after Barack Obama does the same at Tyler Perry’s LA gaff. When did the movies and politics start cohabiting?The ad was called, simply, “Celeb.” Just 30 seconds long, it opened by placing in montage an image of Barack Obama, just weeks from accepting the Democratic nomination for president, alongside Britney Spears and Paris Hilton, before launching into a criticism of his tax and energy policies.