Sen. John Fetterman, D-Pa., delivered a surprise video message at the GOP midterm convention Wednesday night, praising President Donald Trump and Republican Sen. Dave McCormick while rejecting what he described as the Democratic Party’s "extremes and socialism.""I’m a commonsense Democrat. I’m always going to stand with America," Fetterman said. "I’m always going to reject the extremes and socialism and that anti-American way of life."Fetterman introduced McCormick, who is seeking re-election to the Senate, as "the kind of senator that gets the job done" and someone who will "fight for Pennsyl...