A pack of Republicans are in a statistical dead heat for the 2016 Republican nomination, according to a new poll. 

A CNN survey released Tuesday found Sen. Rand PaulRandal (Rand) Howard PaulDem wins Kentucky state House seat in district Trump won by 49 points GOP's tax reform bait-and-switch will widen inequality Pentagon budget euphoria could be short-lived MORE (R-Ky.) and Former Florida Gov. Jeb Bush top the pack with 13 percent support each among Republicans and independents who identify with the Republican Party. 

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However, three other candidates garner support within the margin of error.

Former GOP vice presidential candidate and Wisconsin Rep. Paul RyanPaul Davis RyanRepublicans are avoiding gun talks as election looms The Hill's 12:30 Report Flake to try to force vote on DACA stopgap plan MORE brings in 12 percent, compared to former Arkansas Gov. Mike Huckabee's 10 percent and New Jersey Gov. Chris Christie's 9 percent. 

Polling for the GOP nomination has remained tight. Paul and Ryan topped the list when CNN last polled the question in March

Seven percent of Republicans have no opinion while another 4 percent say they wouldn't vote for anyone listed. 

Other potential GOP candidates scored in single digits, including Texas Gov. Rick Perry (8 percent), Texas Sen. Ted CruzRafael (Ted) Edward CruzOvernight Health Care: Trump eases rules on insurance outside ObamaCare | HHS office on religious rights gets 300 complaints in a month | GOP chair eyes opioid bill vote by Memorial Day HHS official put on leave amid probe into social media posts Trump, Pence to address CPAC this week MORE (7 percent), Wisconsin Gov. Scott Walker (7 percent), Florida Sen. Marco RubioMarco Antonio RubioColbert: Students taking action on gun violence 'give me hope' Lawmakers feel pressure on guns Florida lawmaker's aide fired after claiming shooting survivors were 'actors' MORE (6 percent) and former Pennsylvania Sen. Rick Santorum (2 percent). 

Former Secretary of State Hillary ClintonHillary Diane Rodham ClintonWoman behind pro-Trump Facebook page denies being influenced by Russians Trump: CNN, MSNBC 'got scammed' into covering Russian-organized rally Pennsylvania Democrats set to win big with new district map MORE continues to dominate the Democratic field. Sixty-four percent said they would choose her ahead of a more liberal or conservative Democrat — a drop of 6 percent since January. Thirteen percent said they would pick a more liberal candidate, while 19 percent said they would prefer a more conservative Democrat. 

The poll surveyed 466 Democrats and 473 Republicans, and holds a margin of error of plus or minus 4.5 percent.