washington former finance co-chair chris christie presidential campaign sunday slam christie recent endorsement donald trump accord nbc call new jersey governor supporters reject republican front-runner chris christie endorsement donald trump astonish display political opportunism donald trump unfit president meg whitman chief executive officer hewlett-packard say statement report nbc meet press program christie appear abc week program respond describe whitman great friend different political opinion ok. make country great people differences political opinion say days super tuesday nominate contest christie friday become prominent mainstream republican get behind billionaire republican front-runner former reality tv star declare trump best chance defeat democrat hillary clinton nov. u.s. presidential election whitman statement say new jersey governor make statement despite public misgive trump presidency trump would take america dangerous journey christie know indicate much many time publicly whitman say trump unorthodox candidacy shake republican party draw increasingly vehement criticism rival grow number senior republicans become resign idea candidate november christie withdraw white house bid early month deny reverse course trump promise new hampshire union leader newspaper publisher joe mcquaid would endorse billionaire state feb. primary election true call two days primary say tell endorse donald trump say absolutely untrue endorse anybody christie tell abc report alana wise david morgan edit ros russell article fund part sap independently create reuters editorial staff sap editorial involvement creation production former christie campaign finance chair slam christie endorsement donald trump