Fight with Khan family tests Trump's 'say anything' strategy

Donald Trump's presidential bid has thrived on controversy of his own making. Now, the Republican nominee kicks off the first full week of the general election campaign having put his strategy of saying the politically unimaginable to its greatest test yet.

Trump broke a major US political and societal taboo over the weekend when he engaged in an emotionally-charged feud with Khizr and Ghazala Khan, the bereaved parents of a decorated Muslim Army captain killed by a suicide bomber in Iraq. He further stoked outrage by implying Ghazala Khan did not speak while standing alongside her husband at last week's Democratic convention because they are Muslim.

The outcry was swift and bipartisan, leaving Trump largely isolated among his fellow Republicans.