President Joe Biden wants to revitalize the nation’s labor unions. At their peak, unions represented more than a third of American workers. Now, after several decades of continuing decline, less than 10 percent of workers in the private sector are part of organized labor. The decline is partly because American manufacturing has moved offshore to escape a less-than-friendly business climate created by politicians. But it’s also because over the years, union leadership has cozied up to progressive politicians who push policies at odds with the interests of the rank and file. On his first day in office, Biden signed an executive order killing more than 10,000 good-paying union jobs. But that’s not the first-time middle-class jobs have been sacrificed to win favor with the vocal progressives who have come to dominate the Democratic Party.