Twelve Republican senators are urging President Donald Trump to seek swift passage of his renegotiated North American Free Trade Agreement to avoid challenges the deal will face when Democrats take control of the House in January.

In a letter led by Pennsylvanian Pat Toomey, the senators argued that it would be legally possible under Trade Promotion Authority to cut short the anticipated timeline for approval of the pact—sometime next fall—if the White House were to submit final text and statements of administrative action before the end of the month, triggering a 30-day countdown before Congress could act on it.