The Texas senator takes 31 percent among those likely to attend the Iowa Republican caucuses, set for Feb. 1. This represents an impressive 21-point jump since a Bloomberg/Des Moines Register October poll and the greatest bump any candidate has seen in the last five presidential caucuses in Iowa.
Trump trails 10 points behind in second place with 21 percent of the vote and Carson, the candidate experiencing the greatest loss since October, is in third with 13 percent. Sen. Marco Rubio (R-Fla.) takes 10 percent while Jeb Bush has 6 percent. No other candidate scores more than 4 percent in the poll.
In terms of likability, 73 percent of likely Iowa Republican caucus-goers rate him as favorable, making him the best-liked candidate in the race.
Cruz's rise is primarily a result of evangelical voters moving away from Carson. Forty-five percent of evangelical conservatives stated their support for Cruz in the poll. Evangelicals make up half of the Republican voting block in the Iowa caucus.
Cruz also has immense appeal to the more conservative wing of the party; 46 percent of "very conservative" voters and 39 percent of those who identify with the Tea Party movement support the candidate.
This is the second poll this week to show Cruz in first place in Iowa. A Monmouth University poll released Monday showed him in the lead with 24 percent, ahead of Trump, who scored 19 percent, and Carson, who had 13 percent.
The HuffPost Pollster Iowa chart, which aggregates all public polls, also shows Cruz picking up momentum in the state.
With almost two months to go until the Iowa caucuses, polls are only able to provide a snapshot of the current state of the race and should not be relied on to predict the final outcome.
Cruz's bump in Iowa comes alongside increased campaign efforts in the state. He has spent six out of the last eight weeks campaigning and is more than halfway through his effort to visit all 99 counties. In addition he's rolled out a series ofcampaign ads in the state and picked up key endorsements, including one earlier this week from Bob Vander Plaats, a top evangelical leader in Iowa.
Bloomberg Politics/Des Moines Register surveyed 400 likely Republican caucus-goers using live interviews on landlines on Dec. 7 through 10.
