The blue print is clear: perform well enough in the upcoming primaries to become the consensus alternative to Mr Trump, and then defeat him in a head-to-head sprint for the nomination. Rubio's team had unveiled a flood of endorsements in recent days to cast him as the GOP's preferred alternative to Trump, including nods from the governors from Tennessee, Arkansas and SC.
With Christie's endorsement of Trump on deck and Super Tuesday just next week, more endorsements from NJ Republicans can soon be expected. "I think it's great news that he's endorsing Donald Trump", said Doherty, who represents a conservative district in northern New Jersey.
Christie, known as one of his party's most effective and vicious attack dogs, embraced the role within minutes of joining Trump. The endorsement from Christie comes the day after Rubio changed tactics in Thursday's GOP debate and began to attack Trump on a variety of fronts, from his business background to his preparedness to lead the nation.
Democratic primary - a win that should propel her on a path to the presidential nomination that eluded her in 2008. Clinton could do well in southern states where the Democratic electorate is largely black or Hispanic, but Oklahoma's demographics and voting trends are different - and could benefit Sanders, said Keith Gaddie, chair of the University of Oklahoma's Department of Political Science.
Asked if his strategy to push back against Trump now comes too late, Rubio said he was fighting for the good of his party . The hashtag, #NeverTrump took off on social media Friday evening, racking up more than 155,000 tweets well into the night.
Bernie Sanders, I-Vt., and his wife Jane Sanders board a plane to leave Columbia, S.C., Saturday, Feb. 27, 2016, en route to campaign events in Texas on the day of the South Carolina Democratic Primary. Going into South Carolina, Clinton had just a one-delegate edge over Sanders after her narrow win in Iowa, her sweeping loss in New Hampshire and a five-point victory in Nevada.