Sarah Palin, who ran alongside John McCain in the last U.S. presidential race, says she’ll run against Obama in 2012, “if there’s nobody else to do it.” She made the announcement on Entertainment Tonight, an unlikely venue for announcing presidential ambitions. Palin is considered a favorite of the right-wing Tea Party movement, which calls for smaller government and strict interpretations of the U.S. Constitution. “It’s going to entail a discussion with my family and a real close look at the lay of the land, to consider whether there are those with that common sense, conservative, pro-Constitution passion,” she told ET. Karl Rove, a top Republican party strategist told the Daily Telegraph that she would be an unsuitable candidate, citing her decision to appear in a recent reality TV show filmed in Alaska. Political strategists say former Massachusetts Governor Mitt Romney, former Arkansas governor Mike Huckabee, and former house speaker Newt Gingrich are her most likely opponents for the 2012 Republican nomination.