“But if there’s a strong group of Republicans still next in the end, and if that number is too big, again a plurality leads the way in these early primary caucus states, so it’s possible,” he added.
Walker, who dropped out of the GOP presidential race last month, said Trump can be defeated if the candidates rally around a consensus candidate.
Trump’s numbers were climbing up according to this week polls. A large number of Republicans in the states of Nevada and South Carolina said they see Trump as their most electable candidate in election, according to a new CNN/ORC survey.
In Nevada, 47 percent of likely Republican caucus-goers said Trump “has the best chance of winning the general election next November.” In South Carolina, that number is 44 percent.
New data from a Fox News national poll, however, shows Republican candidate Ben Carson is catching up to Trump.
Carson is just behind Trump by just one point. Trump is still in the lead, with 24 percent of self-identified Republican primary voters saying they would like to see him get the GOP nomination.
But Carson is just behind him with 23 percent support, an 11 point climb since August.
Ted Cruz, the only other Republican candidate with double-digit support, comes in third place with 10 percent.