Arriving in Nevada on Wednesday, Newt Gingrich seemed not to stand a chance against Mitt Romney, but a celebrity endorsement could shake things up. A Gingrich campaign adviser told The New York Times that Donald Trump will announce his endorsement of the former House speaker in Las Vegas on Thursday. Trump’s camp hasn’t confirmed the endorsement but teased the news that he would be making a major announcement with regards to the presidential race. Gingrich told CNN that he and Trump have had little contact since their high-profile New York City gathering in December, shortly before Trump announced he was disassociating himself from the Republican Party, “disgusted” with the GOP’s handling of the payroll-tax-cut extension. Meanwhile, the National Review reports that Sharron Angle will throw her support behind Rick Santorum tomorrow.