Poll: Trump edges ahead of Cruz in Iowa
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Republican presidential front-runner Donald TrumpDonald John TrumpIvanka Trump pens op-ed on kindergartners learning tech Bharara, Yates tamp down expectations Mueller will bring criminal charges Overnight Cybersecurity: Equifax security employee left after breach | Lawmakers float bill to reform warrantless surveillance | Intel leaders keeping collusion probe open MORE narrowly edges out Sen. Ted CruzRafael (Ted) Edward CruzWhatever you think the Alabama special election means, you’re probably wrong This week: Congress gets ball rolling on tax reform Week ahead: Senators work toward deal to fix ObamaCare markets MORE (R-Texas) for the lead in Iowa, a new poll released Tuesday finds. 

The Public Policy Polling (PPP) survey shows the real estate mogul leads Cruz, 28 to 25 percent, within the margin of error. But while Trump leads, Cruz has been building the most momentum, gaining 11 points since the organization's November poll. Trump picked up 6 points since the last poll.

Cruz also had a higher favorability rating, 68 to 20 percent, compared to Trump’s favorability, 53 to 36 percent. 

“Ted Cruz’s momentum in Iowa is getting all the attention,” Dean Debnam, president of Public Policy Polling, said in a news release. “But Donald Trump is on the up swing there as well.” 

Sen. Marco RubioMarco Antonio RubioOvernight Defense: Tillerson, Trump deny report of rift | Tillerson says he never considered resigning | Trump expresses 'total confidence' in secretary | Rubio asks Army to kick out West Point grad Rubio asks Army to kick out West Point grad with pro-communist posts GOP establishment doubts Bannon’s primary powers MORE (R-Fla.) is in a distant third place, with 14 percent, followed by retired neurosurgeon Ben Carson, with 10 percent, and former Florida Gov. Jeb Bush with 7 percent. 

New Jersey Gov. Chris Christie, former Hewlett-Packard CEO Carly Fiorina and former Arkansas Gov. Mike Huckabee all hit 3 percent. Ohio Gov. John Kasich and Sen. Rand PaulRandal (Rand) Howard PaulHouse bill set to reignite debate on warrantless surveillance Authorizing military force is necessary, but insufficient GOP feuds with outside group over analysis of tax framework MORE (R-Ky.) both received 2 percent, while Sen. Lindsey GrahamLindsey Olin GrahamDurbin: I had 'nothing to do' with Curbelo snub Republicans jockey for position on immigration Overnight Health Care: House passes 20-week abortion ban | GOP gives ground over ObamaCare fix | Price exit sets off speculation over replacement MORE (R-S.C.) and former Sen. Rick Santorum (R-Penn.) both register at 1 percent. 

The poll, which was conducted after Trump’s proposal to temporarily ban Muslims from entering the United States, found that 78 percent of voters support his ban, while 13 percent oppose it.

Recent Iowa polls have found Trump and Cruz neck and neck. Last week, a Monmouth University poll found Cruz leading Trump while a new Quinnipiac University poll on Monday showed Trump narrowly ahead of Cruz. 

A RealClearPolitics average of Iowa GOP polls shows Cruz leading Trump by 1 percentage point.

The poll was conducted from Dec. 10 to Dec. 13 and surveyed 522 usual GOP primary voters via phone and Internet. The margin of error was 4.3 percentage points.