According to a CBS News/New York Times national poll, Carson leads Trump 26 percent to 22 percent among likely Republican voters. Carson’s four-point lead is within the survey’s margin of error. Since August, when the same poll gave Carson 6%, his numbers have quadrupled. The rest of the GOP field is far behind. Far behind are Rubio (8%), Bush (7%) and Fiorina (7%). All other candidates are at 4% or less. 70% of Republican primary voters say they have not decided which candidate they will support.