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New Jersey Gov. Chris Christie rates second with 13 percent, followed by Sen. Marco RubioMarco RubioConquering Trump returns to conservative summit Rubio brushes off demonstrator asking about town halls A guide to the committees: Senate MORE (Fla.) with 12 percent and Jeb Bush with 11 percent. Sen. Ted CruzTed CruzConquering Trump returns to conservative summit The Hill's 12:30 Report Cruz predicts another Supreme Court vacancy this year MORE (Texas) and Rep. Paul RyanPaul RyanHouse markup of ObamaCare repeal bill up in the air Trump: House GOP's plan for border tax could create more jobs Conservatives to Congress: Get moving 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 Rodham ClintonConquering Trump returns to conservative summit How the candidates for DNC chair stack up ahead of Saturday's vote DNI official challenges reports of low morale in intelligence community 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.