When they’re vulnerable

“A lot of these people if they’re challenged in a primary, then they really have a hard time, because sometimes the electorate that votes on primary day just isn’t sympathetic. It’s really easy to target incumbents in a primary if they’re unpopular.”

— Clemson University political scientist professor David Woodard on how the best time to beat an incumbent is in a primary, partly because S.C. general election races are among the nation’s least competitive. More.