That said, as a Constitutional conservataive, I don't see where in the Constitution that the Congress would be given the right to pass such a law. Labor relations within a state are none of the Federal government's business. In his answer in the clip, Newt was exactly right."
Same here ,unless there was a part of the video missing.
According to the article “The fact is The National Right To Work Act that is pending in the U.S. Congress does not add a single word to federal law; it simply repeals two sections-two sections that federally authorizes forced-unionism across America.”
However in the video the question is “would you support a federal right to work law?”. Which is a quite different thing - the obvious interpretation of the phrase “federal right to work law” would be a law, at the federal level, banning closed shops etc. in all states. Which would probably be a positive thing, pragmatically, but may or may not be constitutional.