Stating that if a union were to attempt to capture work it had previously acquiesced to non-union workers' performing, such conduct would serve "not to preserve, but to aggrandize, its own position and that of its members," concluding that "[s]uch activity is squarely within the statute" and thus prohibited
Holding that Section 8(b)(B) applied to coercive conduct directed toward secondary employer even where union primarily demanded that employers reassign work