Republican leaders are currently thrashing about - holding secret meetings, issuing confidential memos and making public denunciations - as they approach a state of near panic over what Donald Trump is doing to their party. It's enough to make some believe that Mr Trump may not have the Republican establishment's best interests at heart. Could Donald Trump be a secret double-agent, sent by Democrats to destroy their party from within?Former Florida governor Jeb Bush, who has borne the brunt of more than a few Trump barbs, seems to think there's a possibility."Maybe Donald negotiated a deal with his buddy Hillary...