Washington (CNN) Hillary Clinton is leading top Republican contenders in three crucial swing states by hefty margins, but she has two scenarios where she could be evenly matched, according to a new poll.

Clinton has double digit leads over each of her would-be GOP foes for the presidency in Florida, Ohio and Pennsylvania, with the exception of ties in Florida when matched up against the state's former Gov. Jeb Bush and in Ohio against current Gov. John Kasich, according to a Quinnipiac University poll released Tuesday. No candidate has won the presidency since 1960 without winning two of those three crucial states.

Other native sons didn't fare as well against the former secretary of state, with Clinton still topping Florida's Sen. Marco Rubio 49% to 39% and also leading Pennsylvania's former Sen. Rick Santorum by 10 points in his state.

New Jersey Gov. Chris Christie flopped to Clinton by double digits in each of the three states, according to the poll, including in neighboring Pennsylvania where he caps at 39% to Clinton's 50%, according to the Quinnipiac survey of 881 voters in that state.

Clinton's lead in the polls also match her favorability ratings, which topped 50 percent according to Quinnipiac polling in all three states.

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