PITTSBURGH — As Conor Lamb greeted voters outside of an elementary school polling place, Johanna Stankorb put on her “I voted sticker” and shuffled out of his way. “I voted for Fetterman,” she whispered to a reporter. “Not that I don’t think this kid has fight,” the 54-year-old nurse continued, “I just think right now we need someone who is gonna call it as he sees it … and if somebody can beat the Republicans, it’s gonna be [Fetterman].” Lamb, a 37-year-old Western Pennsylvania congressman, promised voters he was the most electable candidate for a general election. But Democratic voters ove…