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New Jersey Gov. Chris Christie rates second with 13 percent, followed by Sen. Marco RubioMarco Rubio House passes water bill with Flint aid, drought relief What the 2016 election can tell us about 2018 midterms Fight over water bill heats up in Senate MORE (Fla.) with 12 percent and Jeb Bush with 11 percent. Sen. Ted CruzTed CruzThe Hill's 12:30 Report Cruz defends Trump's Taiwan call Ark., Texas senators put cheese dip vs. queso to the test MORE (Texas) and Rep. Paul RyanPaul RyanRyan: GOP won’t ‘pull the rug out’ from 'Dreamers' Look to America's urban areas to create a permanent GOP majority We can’t incarcerate our way out of nonviolent crime 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 ClintonClinton blasts 'epidemic' of fake news Kaine: Flynn spreads conspiracy theories a child wouldn't believe Brian Williams slams fake news 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.