Trump’s Nomination would Rip the Heart out of the Republican Party (Michael Gerson) from the Washington Post
"Trump’s nomination would not be the temporary victory of one of the GOP’s ideological factions. It would involve the replacement of the humane ideal at the center of the party and its history. If Trump were the nominee, the GOP would cease to be. ... as a demagogue, he has followed some of America’s worst instincts wherever they have led, and fed ethnic and religious prejudice in the process. All presidential nominees, to some extent, shape their parties into their own image. Trump would deface the GOP beyond recognition."