Sen. Lindsey Graham (R-SC) has suffered a series of indignities to get in Donald Trump’s good graces. In fact, his transformation from unapologetic critic to sharp-elbowed booster of the former president is one of the most dramatic in American politics.

Yet a Monday spat between the two, in which Trump laid into the senator for “respectfully” disagreeing with his decision to oppose a federal abortion ban, put into sharp relief a truism in the age of Trump: Loyalty is a one-way street.