Jackson doesn't regret telling Collins to 'shut up' after protester interrupted debate

WASHINGTON (AP) — Maine Democrat Troy Jackson says he does not regret telling Sen. Susan Collins that she should “shut up” after the Republican suggested a protester who interrupted their recent debate was one of his campaign's backers. "She said that it was a Troy supporter. She accused me of setting that up. I had no idea who it was,” said Jackson, a former president of the state Senate who is trying to deny Collins, the longest-serving Republican woman in Senate history, a sixth-term. He spoke in an interview with CNN’s “State of the Union” that aired Sunday. During their final debate…