Republican presidential candidate Sen. Ted Cruz has surged past Ben Carson and Donald Trump and ascended into first place in the key primary state of Iowa, according to three new polls released this week.
A Bloomberg Politics/DesMoines Register poll released Saturday finds the Texas senator with 31 percent among those likely to attend the Iowa Republican caucuses, set for Feb. 1.
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.
A Fox News poll released Sunday also shows Cruz in first place with 28 percent of the vote while Trump trails close behind with 26 percent, scoring within the poll's margin of error. Combined, the two candidates draw in more than half of the support of likely Republican caucus voters in the state.
The Fox News Iowa poll is the final poll that CNN is taking into consideration to decide who will appear in the fifth Republican primary debate set for Dec. 15 in Las Vegas. The debate criteria specifies that candidates must score an average 3.5 percent of the vote in national polls or 4 percent in Iowa or New Hampshire polls conducted by major pollsters between Oct. 30 and Dec. 13.
On Sunday afternoon, CNN announced the final lineup of nine candidates who qualified to appear on the main debate stage.
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. Given the volatility of the data so far in advance of the primary election, pollsters have argued that polls should not be used to determine debate participants.
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 Bloomberg/Des Moines Register 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.
A Monmouth University poll released Monday also 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.
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 of campaign 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.
Fox News surveyed 807 Iowa Caucus goers using live interviews to landlines and cell phones on Dec. 7 through 10. The poll's margin of error is 5 percent.
Update: This article has been updated to include Sunday's Fox News poll and the CNN debate lineup.