Comment: Donald Trump is self-destructing before our eyes and top Republicans are terrified it will loosen their grip on power
Perhaps it is cruel, but at the moment there is a sense that Republicans are heading for the life rafts rather than risk going down with SS Trump. After last night's debate, that could become a stampede.
Donald Trump had already signalled he would adopt a scorched earth approach, going for the Clintons' private lives in what is looking like a desperate attempt to switch focus away from his own chequered personal history.
His crude and lewd comments about groping women, albeit made more than a decade ago, were the final straw for Jason Chaffetz, a Utah congressman and Gary Herbert, the state's governor, who withdrew their support.