Barely a week into the job, Donald Trump’s new campaign CEO is already facing harsh scrutiny over a 20-year-old domestic-violence charge and an allegation of voter-registration fraud. On Thursday night, the New York Post and other outlets reported that Stephen Bannon was charged with misdemeanor domestic violence, battery, and dissuading a witness in 1996, after an altercation with his then-wife in Santa Monica, California. According to a police report, Bannon’s spouse said he pulled at her neck and wrist. A spokesman told Politico that Bannon was never questioned by police and pleaded not guilty. The charges were dropped around the time that the couple divorced later that year. In divorce...