These Democrats may be benefiting as much from Republican weakness and the national environment as from an affirmative embrace of their politics. 

Troy Jackson, the Democratic nominee in Maine’s Senate race, said Sunday he does not regret telling his opponent Sen. Susan Collins (R-Maine) to “shut up” during a candidate debate that was interrupted by an anti-data center protester. During an interview on CNN’s “State of the Union,” host Dana Bash asked Jackson whether he regretted the…