The Khan controversy may be one insult too many for Teflon Don as his wild campaign shows signs of cracks
Donald Trump has insulted women, Muslims, Mexicans, the disabled and countless other demographics and individuals in this extraordinary, disturbing US election cycle.
Until now, his deeply offensive rhetoric and playground bullying have done little to affect his popularity as his polling numbers continued to rise and he swept to the Republican nomination.
He has even just clashed with the mother of a crying baby in Virginia. Initially, he said: "Don't worry about that baby. I love babies."