Alabama Democratic Sen. Doug Jones was gifted his seat on the Hill. His Republican opponent during the 2017 special election was marred by sexual misconduct allegations involving girls who were underaged at the time. Roy Moore was a trainwreck—and he could torpedo GOP chances of retaking the seat in 2020 because he’s running again. Pass the whiskey bottle. This is an insanely winnable seat that could be held by Democrats if Moore muddies the waters. Jones was lucky in that the Alabama GOP in some odd turn of events, couldn’t get a sentient being to run for then-Attorney General Jeff...