Clinton leads rivals by only 6 points in Iowa
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Sen. Rand PaulRandal (Rand) Howard PaulOvernight Defense: Congress poised for busy week on nominations, defense bill | Trump to deliver Naval Academy commencement speech | Trump administration appeals decision to block suspected combatant's transfer Democrats mull audacious play to block Pompeo Overnight Defense: Trump steps up fight with California over guard deployment | Heitkamp is first Dem to back Pompeo for State | Dems question legality of Syria strikes MORE (R-Ky.) and Rep. Paul RyanPaul Davis RyanA warning to Ryan’s successor: The Speakership is no cakewalk Republicans divided over legislation protecting Mueller The Hill's 12:30 Report MORE (R-Wis.) trail Hillary ClintonHillary Diane Rodham ClintonPaltry wage gains, rising deficits two key tax reform concerns Trump pressed Sessions to fire FBI agents who sent anti-Trump texts: report DNC sues Russia, Trump campaign and WikiLeaks over alleged election interference MORE by only 6 percentage points in 2016 hypothetical match-ups in Iowa, according to a Quinnipiac University poll released Monday.

Clinton leads Paul 46 percent to 40 percent and leads Ryan 47 percent to 41 percent, the survey found. Clinton also leads other potential GOP presidential contenders, including former Govs. Mike Huckabee (R-Ark.) and Jeb Bush (R-Fla.). 

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She leads Bush by double digits, 49 percent to 36 percent. 

The poll also found Gov. Chris Christie (R-N.J.) has been closing in on Clinton’s lead. Clinton maintains a 44 percent to 36 percent lead, compared to the 48 percent to 35 percent lead she held against Christie in a March survey. 

"Things are getting a bit better in Iowa for New Jersey Gov. Christopher Christie," said Peter A. Brown, assistant director of the Quinnipiac Poll. "Secretary Clinton leads all the potential GOP candidates with U.S. Rep. Paul Ryan and Sen. Rand Paul running closest, six points in back of her."  

More than half of Iowa voters said they view Clinton favorably; Huckabee received the highest favorability rating, 41 percent, among his possible Republican competitors.

Forty percent of Iowa voters said they approve of President Obama’s job as president, while more than half disapprove. 

The survey comes as Clinton heads into her third week of her national book tour for her new memoir, Hard Choices. She’s considered the Democratic front-runner for president in 2016 if she decides to run.

The poll surveyed 1,277 registered voters in Iowa from June 12 to16 with a  2.7 percentage point margin of error.