The anti-Trump super-PAC that spent more than $2 million slamming the billionaire in Iowa is preparing to launch a new secret weapon in New Hampshire -- John McCain. "Probably the only significant strategy shift is we are going to remind voters in New Hampshire about the disgraceful things that he said about John McCain," said the leader of Our Principles PAC, Katie Packer, who was Mitt Romney's deputy campaign manager in 2012. Trump offended many Republicans when he mocked McCain's Vietnam War service last July, saying "he was a war hero because he was captured. ... I like people who...