New York CNN  —  The ripple effect of Jeff Bezos’s decision to block The Washington Post from endorsing a presidential candidate continues to reverberate through the newspaper, as a tidal wave of readers cancel their subscriptions and nearly one-third of the Post’s editorial board step down in protest. The resignations came Monday as David Shipley, the Post’s editorial page editor, met with staffers in the opinion section, telling them that Bezos, the newspaper’s owner, first expressed doubts