From the Morning Call's Colby Itkowitz:

WASHINGTON — The two Republicans running for statewide office in Pennsylvania maintain their solid leads exactly four weeks before Election Day, according to a new Morning Call/Muhlenberg College released Tuesday.

Among likely Pennsylvania voters, GOP gubernatorial nominee Tom Corbett leads by 11 percentage points, 47 percent to 36 percent, over his Democratic opponent, Dan Onorato. Republican U.S. Senate candidate Pat Toomey leads by 7 percentage points, 45 percent to 38 percent, over Democrat Joe Sestak.

. . . The poll of 577 likely voters was conducted between Sept. 28 and Monday. It has a margin of error of plus or minus 4 percentage points.