The AFL-CIO, the largest U.S. federation of labor unions, will launch digital attack ads targeting Republican front-runner Donald Trump next week as part of a multi-pronged effort to derail the New York billionaire's bid for the White House and dampen union workers' enthusiasm for him. Officials at the AFL-CIO, an umbrella group of 56 unions representing 12.5 million workers, told Reuters the ads will depict Trump as anti-union, and will appear on Facebook and Twitter. "Donald Trump has tapped into the very real and understandable anger of working people. But while he says he's with America's working people, when you...