Trump now has more of the vote than the 2nd, 3rd and 4th place candidates combined.
Ted Cruz is the only one in sight, but he trails by 21 points.
Washington (CNN)—Donald Trump seems set to end 2015 as the dominant force in the race for next year's Republican nomination for president, with Texas Sen. Ted Cruz now a clear -- yet distant -- second after a strong debate performance, a new CNN/ORC poll released on Wednesday has found.CNN: Republicans now see Trump as best chance to win the White House in 2016
Trump tops the field with 39%, according to the poll of Republican and Republican-leaning registered voters. That's more than double the share backing Cruz, who, at 18%, has inched up 2 points since the last CNN/ORC poll, which was taken in late November.
Trump has been a constant atop the polls since his ascent to the lead in July, and this new poll marks the first time Cruz stands significantly apart from the other candidates vying for the nomination. Behind those two, Ben Carson and Florida Sen. Marco Rubio have each slipped a few points and now stand tied at 10%.