What bargaining chip did the opposition MPs "give" the US administration relevant to free trade?

Trump administration insiders are already well briefed on Trudeau and his strengths (great hair), weaknesses (shallow as a bird bath for anorexic sparrows), peculiar thoughts on military issues and terrorism (if we kill the enemy, the enemy wins), anti-Americanism, love of the Chinese communist dictatorship, etc.

But they are and will stay focused on reaching the best possible rewrite of NAFTA in American economic and employment interests regardless of other irritants from The Clown Prince .

The parliamentary opposition's job is to hold the government to account not to serve as ambassadors (Trudeau has people for that) and cheerleaders and pom pom girls (we have enough of them here) for Trudeau and the Liberal government. 

Opposition and public outrage at the Khadr payoff will no more affect the NAFTA negotiations than the Liberals apocalyptic outrage against the original NAFTA did.