A charity event in honor of a police officer killed while responding to a mass shooting in Thousand Oaks, California last year has been canceled after the local police chief and a Democratic politician objected to the participation of prominent Republicans, according to organizers who spoke with a local Fox affiliate. The event, a flag-football game called the Blue Bowl, was supposed to have taken place at Newbury Park High School in Thousand Oaks. Los Angeles Rams football players were scheduled to show up and sign footballs imprinted with pictures of the fallen officer, Sgt. Ron Helus. And thousands of...