From Politico:

Illinois Sen. Barack Obama is surging in Pennsylvania, according to several new polls. In one survey, released by Public Policy Polling this morning, Obama is now leading New York Sen. Hillary Clinton for the first time, 45 percent to 43 percent. That represents a closing of a 26-percentage-point Clinton advantage from only two and a half weeks ago.
The Pennsylvania Democratic presidential primary is scheduled for April 22.
Obama’s gains are largely due to a narrowing of the gap with white voters—29-percentage points according to PPP—but he continues to trail Clinton 49 to 38 percent among whites. In mid-March, according to PPP, Clinton led 63 percent to 23 percent among whites. That mid-March poll occurred prior to Obama’s race speech, at the height of the controversy over Rev. Jeremiah Wright.