The most recent edition of Time magazine's "100 Most Influential People" includes the current POTUS, and while many were likely more than willing to lay sycophantic petals at his feet, who better to put on the kneepads than the servile punching bag without honor?
Meanwhile, Senator John McCain [R-AZ], a man who Trump has insulted and mocked numerous times, had his eldest offspring, Meghan McCain of The View,
Basically, Republicans will be served shit for dinner and ask for seconds if it means advancing their agenda. No amount of insults or humiliation is enough to push back, stand tall and preserve their dignity—not when there's a dirty chalice of power to drink from.