They're Republicans, so they already have an 11th commandment created by Ronald Reagan in the 1960s, I shit you not. "Thou shalt not speak ill of any fellow Republican."
It's one of the reasons Trump so easily took over the GOP, that they had a stupid rule that they followed that emphatically placed party before country, created by a president who seemed to specialize in making sure that the future was as shitty as possible.
People today watching old SNL sketches: "You know what? I actually do want to live in a van down by the river."