Wolf, a former state revenue secretary, had the support of 40 percent of respondents who said they were likely to vote in the Democratic primary - almost three times his closest rival, U.S. Rep. Allyson Y. Schwartz of Montgomery County, who had 14 percent.
A pack of rivals was bunched closely together behind the two leaders in the Saturday-Sunday survey by the Republican-leaning firm.
State Treasurer Rob McCord had 8 percent; former Auditor General Jack Wagner of Pittsburgh, who declared his interest in the race last week, had 7 percent, as did former environmental secretary John Hanger. Katie McGinty, who also was once the state's chief environmental official, had 6 percent. Nineteen percent of respondents said they were undecided.
McCord has been elected twice statewide, and Schwartz, who represents the 13th District, has a base in the vote-rich Southeast. Neither has advertised yet in the governor's race.
