Polling data in three swing states have Democratic presidential candidate Hillary Clinton in narrow or losing positions against Republican presidential candidate Marco Rubio.

"It's a long way until Election Day, but in the critical swing states of Florida, Ohio and Pennsylvania, U.S. Sen. Marco Rubio of Florida has a tiny edge over the GOP field," said Peter Brown, assistant director of the Quinnipiac Poll. "Most of the eight GOP hopefuls are within striking distance of Secretary Hillary Clinton in at least one of the three states."

Florida:

In the Sunshine State, former Secretary of State Clinton did manage to receive more support than Rubio. The Quinnipiac report found Clinton receiving 47 percent to Rubio's 44 percent. In the hypothetical match against Clinton, Rubio secured the narrowest margin of victory for Clinton among the GOP presidential candidates.

Former Florida Gov. Jeb Bush also lost against Clinton. While she received 46 percent, he attracted 42 percent of the vote.

Clinton's lead increased against the rest of the GOP field. In a hypothetical match against Sen. Ted Cruz of Texas, she "buries" him with 48 percent to 37 percent, respectively. She also defeated Sen. Rand Paul of Kentucky -- 46 percent to 39 percent -- and Wisconsin Gov. Scott Walker -- 48 percent to 38 percent.

"Secretary Clinton continues to out-poll most major Republican wannabes in the Sunshine State. She holds her own when matched against the GOP's two native sons, former Gov. Jeb Bush and Sen. Marco Rubio. The margin stems from her ability to keep the gender gap running in her favor. She holds low double digit leads among women when matched against either man and that is enough to make the difference" Brown said.

Ohio:

In Ohio, Clinton defeated Rubio with 45 percent to 42 percent. While Clinton encountered a tie against Paul -- 43 percent, each -- she did lose in one hypothetical matchup against a politician who has not announced his presidential bid. Clinton lost against Ohio Gov. John Kasich, 47 percent to 40 percent.

Brown said, "Gov. John Kasich's 47-40 percent lead over Secretary Clinton is the largest of any GOP candidate in any of the three states. With Ohio being such a critically important state -- no Republican has ever won the White House without carrying it -- that gives Gov. Kasich a key talking point about why he should be the nominee."

Pennsylvania:

Rubio finally managed to defeat Clinton in Pennsylvania. The Florida senator received 44 percent to her 43 percent. Clinton's loss continued against Paul with a narrow 45 percent to 44 percent.

Rubio finally managed to defeat Clinton in Pennsylvania. The Florida senator received 44 percent to her 43 percent. Clinton's loss continued this time against Paul with a narrow 45 percent to 44 percent.

New Jersey Gov. Chris Christie also managed to be a potential threat to Clinton's White House aspiration. Although he lost in a hypothetical matchup against Clinton, it was only by 2 percentage points -- 43 percent to 41 percent.

"Bottom line, no one is stepping up to take a roundhouse at Hillary Clinton in Pennsylvania," said Quinnipiac University Poll Assistant Director Tim Malloy. "She may look vulnerable on paper, but the GOP field is just not pressing her. Not a runaway by any measure, but imagine Clinton's numbers if she had the full trust of Pennsylvanians."

The Quinnipiac poll was conducted between June 4 and June 15 with 1,147 Floridian, 1,191 Ohioan and 970 Pennsylvanian voters.

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