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New Jersey Gov. Chris Christie rates second with 13 percent, followed by Sen. Marco RubioMarco Antonio RubioHow a nice-guy South Dakota senator fell into a Trump storm Republicans threaten floor takeover if Democrats weaken filibuster  Democrats must close the perception gap MORE (Fla.) with 12 percent and Jeb Bush with 11 percent. Sen. Ted CruzRafael (Ted) Edward CruzOvernight Energy & Environment — Lummis holds up Biden EPA picks Equilibrium/Sustainability — Bald eagle comeback impacted by lead poison The Hill's Morning Report: Biden takes it on the chin MORE (Texas) and Rep. Paul RyanPaul Davis RyanOn The Trail: Retirements offer window into House Democratic mood Stopping the next insurrection Former Sen. Bob Dole dies at 98 MORE (Wis.) garner 10 percent. Nineteen percent of Republicans are undecided. 

Rubio’s numbers have dropped 7 percent since an April survey. 

The numbers contrast with a Democratic affiliated Public Policy Polling survey released last week that showed Cruz surging after his 21-hour floor speech against ObamaCare. Cruz closely trails Paul among Tea Party voters, taking 20 percent. 

Fifty-eight percent of people say they have not heard enough about Cruz to form an opinion. 

On the Democratic side, Hillary ClintonHillary Diane Rodham ClintonNYT columnist floats Biden-Cheney ticket in 2024 Centrist Democrats urge progressives to tamp down rhetoric Stacey Abrams's shocking snub of Biden, Harris signals possible 2024 aspirations MORE continues to dominate a potential 2016 Democratic primary, with 61 percent of Democrats saying they would vote for her. Vice President Biden takes 11 percent. Those numbers are largely unchanged since Quinnipiac’s last poll in May. 

The poll surveyed 1,497 registered voters and has a margin of error of 2.5 percent.