CNN has Trump with a solid lead:
In the Republican race, Trump, at 38%, tops Texas Sen. Ted Cruz, who holds second place with 22%. Behind those two, Florida Sen. Marco Rubio garners 14% support, former Florida Gov. Jeb Bush is at 10%, retired neurosurgeon Ben Carson has 6% and Ohio Gov. John Kasich is at 4%.
Although there is this caveat:
The poll suggests Trump’s support may have softened after Saturday’s debate among the GOP candidates. In interviews conducted before the debate, 40% backed Trump, compared with 31% who said they supported him after the raucous matchup between the remaining candidates in the field. Two candidates who attempted to remain above the fray in the debate — Carson and Kasich — each appeared to get a bump in the post-debate interviews, though the increase for both candidates was within the margin of sampling error for the post-debate interviews.