Democratic businessman Tom Wolf starts his challenge to embattled incumbent Pennsylvania Gov. Tom Corbett (R) with a lead of 20 points or more, according to polls conducted since Wolf handily won the May 20 Democratic primary.
In a Quinnipiac University poll released Wednesday, Wolf leads Corbett by 53 percent to 33 percent, nearly unchanged from his margin in a February survey.
Just 29 percent of voters rated Corbett favorably, and only 35 percent approve of his job as governor, with his cuts to education spending cited as one of the top reasons for disapproval.
Wolf remains lesser-known, with 38 percent saying they haven't heard enough about him, but he's rated favorably by 46 percent of voters, with just 14 percent rating him negatively.
Two other surveys also show Wolf significantly ahead.
HuffPost Pollster's poll-tracking model, which incorporates all publicly available polling, gives Wolf a lead of about 21 points over Corbett.
The Quinnipiac poll surveyed 1,308 registered voters by phone between May 29 and June 2, calling both landlines and cell phones. PPP surveyed 835 voters between May 30 and June 1, while Rasmussen surveyed 750 likely voters on May 28 and 29.