By Tony Romeo

HARRISBURG, Pa. (CBS) — A new poll of Pennsylvania GOP voters taken before last night’s debate shows Donald Trump and Ben Carson neck-and-neck with registered Republicans, while Democrats are solidly behind Hillary Clinton.

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Franklin and Marshall College Poll Director Terry Madonna says Donald Trump is at 23-percent, and Ben Carson at 22-percent, among Pennsylvania Republicans. But Madonna is more intrigued by Marco Rubio’s third-place showing at 13-percent.

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“In fact it now looks like Rubio could be the candidate in waiting, if you will, as the establishment candidate should Trump and Carson falter.”

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On the Democratic side, it’s no contest, with 52-percent favoring Hillary Clinton, and Bernie Sanders at just 18-percent. A majority of all registered voters – 51-percent – now believe embattled Attorney General Kathleen Kane should resign. And Madonna says Pennsylvania voters now say the number one problem facing the state is, by far dysfunctional government.