Pennsylvania Democratic gubernatorial candidate Tom Wolf has opened up a 22-point lead over Republican incumbent Gov. Tom Corbett, according to a new poll released Wednesday.

Wolf, the York County businessman who blew through a crowded Democratic primary, holds a 47-percent-to-25-percent lead over Corbett, with 27 percent indicating they're unsure of who to vote for. A mere 26 percent of voters surveyed believe Corbett has performed well enough to deserve re-election.

The Franklin & Marshall College poll indicates more bad news for Corbett. Twenty-two percent of voters say education is their top priority when voting for governor. Corbett, when he first took office in 2011, slashed the education budget because of hold-over funds that were set to disappear, leaving the perception that he had initiated the cuts. Corbett has never been able to recover in the polls from those cuts.

Other findings from the poll include an increased support for medical marijuana. Eighty-four percent of voters favor allowing the use of marijuana for medicinal purposes, up from 81 percent earlier this year.

And as the state remains locked in a budget battle centered largely around pensions, 39 percent of voters say cutting spending and increasing taxes is the way to balance the state's budget, while 30 percent favor cutting state programs and services.

A positive sign for Democrats in Pennsylvania is that President Obama's job approval is up to 34 percent, higher than it was in January, when he was at 30 percent. The president has campaigned in Pennsylvania three times this year alone, and a positive attitude toward the administration could help Democrats on the ticket in November.