Greg Lalevee is standing in the midst of a truly epic collection of construction equipment at his union’s training center, just off the New Jersey Turnpike. This former sand mine, which his union uses to train workers in construction equipment, is bristling with cranes, pile drivers and dozens of other pieces of heavy machinery. But before showing off a construction arsenal vast enough to raise a skyscraper on the spot, Lalevee is enthusing about his union’s good fortune as Congress finally pays attention to infrastructure. “When President Biden announced his plans, for us to hear that — it was nirvana,”...