Poll: Paul leads GOP presidential pack

New Jersey Gov. Chris Christie rates second with 13 percent, followed by Sen. Marco RubioMarco RubioRubio: GOP Congress could go in different direction than Trump Poll: Clinton holds 4-point lead in Florida Republicans, it's time to stop asking 'What would Reagan do?' MORE (Fla.) with 12 percent and Jeb Bush with 11 percent. Sen. Ted CruzTed CruzIs Georgia turning blue? Five takeaways from money race Club for Growth: Anti-Trump spending proved to be 'good call' MORE (Texas) and Rep. Paul RyanPaul RyanCalifornia House Republicans facing tougher headwinds Breitbart escalates war on Paul Ryan GOP: Obama ‘in denial’ about healthcare law failures 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 ClintonHeck's rejection of Trump imperils Nevada Senate race Goldman CEO: 'I’m supportive of Hillary Clinton' Reuters projects Clinton to win with 326 electoral votes 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.