Otherwise US will pull out of agreement

The US Treasury Secretary Mnuchin is on the wires saying that he expects NAFTA will be renegotiated, otherwise the US will pull out of the agreement.

That seems to be by definition. Otherwise why all the fuss about the agreement in the first place (so he is kind of stating the obvious).

Mnuchin is speaking LIVE at the daily White House briefing. He is answering reports questions on NAFTA, tax withholding tables (that are just released) that will guide employers on the amount to withhold from pay checks, and on other matters dealing with the economy.