Khizr Khan is the father of Humayan S. M. Khan, an Army captain killed in action in Iraq in 2004.
http://m.huffpost.com/us/entry/8758646.html
In the above HuffPo article he mentions the duty of the Muslim community to out the terrorists hiding in the US. While he fails to grasp Trump’s position (full ban until we can screen), it sounds like he could end up saying some things that will be “inconvenient” for the ‘Rats.
So Captain Khan served his country, and died during George W. Bush’s administration. Bush never tried to gain politically from this man’s death, but H(er) R(oyal) C(rotch) will.