I'd describe it as regulated pretty heavily in both directions, with some provisions to protect unions and some to restrict unions. The two primary pieces of le

I'd describe it as regulated pretty heavily in both directions, with some provisions to protect unions and some to restrict unions. The two primary pieces of legislation reflect that: the National Labor Relations Act (1935, part of the Second New Deal) mostly protects unions, while the Taft-Hartley Act (1947, passed over Truman's veto) mostly restricts unions.