I think it's largely the power that unions have here once established. For recent examples, one can look at the spate of news about union crane operators at the

I think it's largely the power that unions have here once established. For recent examples, one can look at the spate of news about union crane operators at the ports of LA and Long Beach, but there are a ton of them. Large unions become huge political contributors, and affect policy decisions to an extent that often outweighs any influence they could get without that money, and that rubs people the wrong way as well.