Former President Barack Obama insisted Saturday that Pennsylvania Lt. Gov John Fetterman was fit to serve in the US Senate despite the lingering effects of a stroke suffered in May. Fetterman is facing Republican opponent Dr. Mehmet Oz in a tight contest for the Keystone state’s open Senate seat. “John’s stroke did not change who he is, it didn’t change what he cares about, it didn’t change his values, his heart, his fight,” Obama said during a rally in Pittsburgh. “It doesn’t change who he will represent when he gets to the United States Senate. He’ll represent you. And that’s...