Sarah Palin's endorsement of Donald Trump united two favorites of Republican conservatives, but it's an open question whether Palin's nod will help the billionaire front-runner.
The former Alaska governor is making known her favorite in the presidential race just two weeks before the Iowa caucuses where polls show Trump in a dead heat with U.S. Senator Ted Cruz of Texas—a candidate who benefitted from Palin's backing in his 2012 Senate race.
