 Listing recent incidents of political violence from members of Congress being shot to the storming of the Capitol on January 6th and then the attempt on former President Trump's life, Biden said this sort of violence can't be normalized. Disagreement is inevitable in American democracy. It's part of human nature. But politics must never be a literal battlefield, a God forbid, a killing field. I believe politics ought to be an arena for peaceful debate. The presidential campaign is about to be backfired.