Before Trump got elected, he made a fuss about how America's trade policies has pretty much been a disaster which many in the Midwest agreed and supported him.
Now that he's in, trade policies, and the facts we had regulations and taxes before NAFTA and still kept factories, are being ignored while the focus is on the mantras that Republicans have been collectively chanting for the last eight years. It's not the policies that are the problem, it's the regulations and taxes. So the answer seems to be it was empty talk. Everyone knows what it was like before NAFTA, including Trump, but those Senators and Representatives will not change things no matter what. They refuse to repeal the crappie agreements that have unnecessarily taken so many jobs away, even when Trump, a businessman, knows this is why. He said it before he was elected.
If jobs don't return, forget partisanship and keep voting them out until they do. Hold them accountable.