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New Jersey Gov. Chris Christie rates second with 13 percent, followed by Sen. Marco RubioMarco RubioRubio wades into Trump-Lewis feud 19 companies that Trump has tweeted about Ex-Dem gov: I would have picked Giuliani over Tillerson MORE (Fla.) with 12 percent and Jeb Bush with 11 percent. Sen. Ted CruzTed CruzRight renews push for term limits as Trump takes power Dissenting nominees give hope to GOP skeptics of Trump UN leader willing to meet lawmakers amid push to cut funding MORE (Texas) and Rep. Paul RyanPaul RyanWeek ahead: Trump's health pick takes the hot seat Trump criticizes controversial piece of House GOP tax plan Hispanic Dems warn Latinos will be hit hard by ObamaCare repeal 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 ClintonWeek ahead: Comey under fire; Lawmakers look for Russia response Conway: ‘We would welcome a call’ from Lewis Laura Ingraham mulling Senate run: report 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.