Those are all weak showings for long standing incumbents, expecially anthing below 60%. If there had been better known and better financed primary challengers, four of them would have been defeated, and maybe all six.
But it’s tough to get well known individuals to challenge these entrenched incumbents.
“But it’s tough to get well known individuals to challenge these entrenched incumbents.”
Unknowns getting 40%+ against well-known, established incumbents should change that!
Crowded primary races will save an incumbent every time.