Democrat Mayor Karen Peconi is facing public backlash after a series of messages in which she reportedly called for “rioters to be destroyed by a water cannon.” On Facebook, the Arnold, Westmoreland County, mayor reportedly said that she was “posting this so the authorities everywhere sees this … bring the hoses.” Then, “they don’t care about jobs for PGH … none of them work now. That’s how they can do this at 7 a.m. Very sad.” Another post references a 1963 protest photo in which a large water cannon is taking aim at protesters demanding equal rights, saying, “we need...