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MUST SEE: Netflix releases chilling trailer for House of Cards season 3
Editor's note: Spoiler alert! If you're not caught up through Season 2 of Netflix's "House of Cards," you may want to stop reading. (CNN) -- When last we saw Kevin Spacey's ruthless Frank Underwood, he had just schemed and backstabbed his way from Congress to the Oval Office. But there's a reason the show is called "House of Cards." Even as newly sworn President Underwood, his grip on power will no doubt remain precarious.