HARRISBURG, Pa. -

A new poll shows Democratic nominee Tom Wolf leading Republican incumbent Tom Corbett by a formidable 20 points in Pennsylvania's gubernatorial campaign.

The survey of 1,308 Pennsylvania voters released Wednesday by Connecticut-based Quinnipiac University shows Wolf backed by 53 percent and Corbett with 33 percent. Eleven percent were undecided.

"The election is five months away, but Pennsylvania Gov. Tom Corbett looks like easy prey for Democratic challenger Tom Wolf," said Tim Malloy, assistant director of the Quinnipiac University Poll.

The margin is almost identical to Wolf's 52-to-33 percent advantage over Corbett in a hypothetical match-up by Quinnipiac in February. That was months before Wolf won the Democratic nomination with 58 percent of the vote in a four-way primary.

The poll contained little good news for Corbett. Only 29 percent of the respondents said they view him favorably, contrasted with 46 percent who said that about Wolf.

The margin of error for the telephone poll was plus or minus 2.7 percentage points.