Of course, actions speak louder than words; Ronald Reagan fired the air traffic controllers when they went on strike- breaking their union for all time- and as president of the Screen Actors Guild he was notoriously pro-management, and weakened the union considerably before finally resigning under pressure before his term was up.
Reagan gave dedicated union foes direct control of the federal agencies that were designed originally to protect and further the rights and interests of workers and their unions.
And Regan's anti-labor policy didn't stop with union-busting. He attempted to lower the minimum wage for younger workers, ease the child labor and anti-sweatshop laws, tax fringe benefits, and cut back job training programs for the unemployed. He tried to replace thousands of federal employees with temporary workers who would not have civil service or union protections.
Only when the communist government of Poland (in those days a puppet regime of the soviet Union) tried to do a little union-busting of their own did Reagan come out in favor of unions. The enemy of my enemy…