You got it! "Free Markets" means I have (or demand) free unfettered access to your national market but put tariffs and trade barriers restricting your access to mine. Everyone plays this game and there's always an excuse for it. Some worse than others and some a little better.
It's <deleted> anyway - if there was ever to be a free Market it would have to be free market in Capital AND Labor - you can't have a free market that allows the unrestricted movement of one whilst denying the movement of the other. Just as capital demands the right to move where it will receive the greatest return, so should labor be free to move to wherever it gets the greatest return.