NEW : He did n't want to `` stand in the way '' of candidate who can beat Obama , official says . NEW : The White House has not yet decided whether it will endorse a presidential bid by Sen. Barack Obama, D-Ill., or his wife, Michelle, officials said Tuesday night. The former Utah governor will endorse Mitt Romney , a source says . Earlier Sunday , South Carolina 's largest newspaper endorsed Huntsman .
NEW : He did n't want to `` stand in the way '' of candidate who can beat Obama , official says . NEW : Jon Huntsman made a `` basic calculation , '' says CNN 's John King . The former Utah governor will endorse Mitt Romney , a source says . Earlier Sunday , South Carolina 's largest newspaper endorsed Huntsman .