Depends on what unions you're referring to. While it isn't what it was years ago, the mob's greatest clout is still found in the unions involved in the construction industry - Carpenters, Laborers, Operating Engineers, etc. Giuliani wasn't successful at instituting his reforms in the building trades like he was in other areas. And construction is just too diversified to regulate in the same way. The mob still has some clout on the waterfront via certain ILA locals. Especially the Genovese family on the Jersey docks. The biggest decline seems to be in the clout the mob had over the Teamsters. Loss of control over certain IBT locals, as well as various indictments and new regulations in certain industries, was what helped largely remove the mob from trucking in the garment center, at the airports, at the wholesale food markets, and in the city's commercial garbage industry.