The latest Rasmussen Reports national telephone survey of Likely Republican Voters finds Trump with 36% support, giving him a 15-point lead over Senator Marco Rubio who earns 21% of the vote. Senator Ted Cruz is in third place with 17%.

For Trump, that’s a five-point gain in support from the beginning of this month just after the Iowa caucus and right before the New Hampshire primary when it was Trump 31%, Rubio 21% and Cruz 20% among likely GOP voters. Rubio’s support has held steady, while support for Cruz has fallen slightly.

In mid-December, Trump led with 29% Republican support, with Cruz in second with 18% and Rubio at 15%.