Democrats on Thursday welcomed Mark Critz to their ranks after he dashed Republican hopes of capturing a Pennsylvania House seat seen as a possible bellwether for the midterms. House Speaker Nancy Pelosi, D-Calif., swore in Critz after he won a special election to fill the final months of the late Rep. John Murtha's term. The longtime Murtha aide beat Republican Tim Burns on Tuesday. Both candidates will meet again this fall. "This moment is bittersweet for me," said Critz, recalling his former boss who died in February at age 77 from complications of gallbladder surgery. Murtha had held the seat...