Americans are more fearful about the likelihood of another terrorist attack than at any other time since the weeks after Sept. 11, 2001, a gnawing sense of dread that has helped lift Donald J. Trump to a new high among Republican primary voters, according to the latest New York Times/CBS News poll. From Our Advertisers In the aftermath of attacks by Islamic extremists in Paris and in San Bernardino, Calif., a plurality of the public views the threat of terrorism as the top issue facing the country. A month ago, only 4 percent of Americans said terrorism was the most...