Although Donald Trump has been eager to garner support from American labor unions for his re-election campaign, there are lots of reasons he’s not going to get it. Chief among them is his record in sabotaging the nation’s labor movement.During his decades as a wealthy businessman, Trump clashed with unions repeatedly. And, upon becoming President, he appointed people much like himself—from corporate backgrounds and hostile toward workers—to head key government agencies and departments. Naturally, an avalanche of anti-union policies followed.Under Trump, the National Labor Relations Board (NLRB)—the federal agency enforcing the nation’s fundamental labor law, the National Labor Relations Act—led ...