Pat Buchanan: Regardless of nominee, Donald Trump surge marks 'death rattle' of establishment ... We hear wails that the nomination of Trump would mean the end of the conservative movement. But how so? If Trump won and conducted a conservative government, it would validate the movement. If Trump won and turned left, it would inspire an insurgency like Ronald Reagan’s in 1976, when the Ford-Rockefeller-Kissinger administration moved too far toward detente. If Trump ran and lost, the conservative movement would have President Clinton to unite and rally the troops against. One recalls Barry Goldwater’s historic wipeout in 1964. But, in...