The latest Republican debate for president could get interesting.

Donald Trump at a campaign rally on October 21, 2015 in Burlington, Iowa. (Photo by Scott Olson/Getty Images)

Donald Trump is falling in the polls. He's now number two to Ben Carson. Some political pundits are predicting Trump could react like a wounded animal and be even more incendiary and outrageous.

Some also speculate this is the beginning of the end for Trump and that his celebrity has worn off with voters now looking for a real candidate.

That could open the door to the rest of the pack with all still struggling for name recognition, including Gov. Chris Christie.

Tonight's debate airs on CNBC at 8 p.m.