US President Barack Obama will get the Trans-Pacific Partnership (TPP) deal through Congress, the US ambassador to New Zealand says.
Mr Obama has said he's confident the US Congress will ratify the 12-nation TPP, which aims to liberalise 40 percent of the world's economy.
The free trade deal is facing stiff opposition from many Democrats and unexpected resistance from Republicans.
Mark Gilbert, the US Ambassador to New Zealand, told The Nation program today it was important for Mr Obama to get the deal through Congress.
"I believe he can," he said.
"He just sent it to Congress. They will have a chance to review it and then they will have an up-and-down vote on it and I believe he will be successful."
He says the vote will be tight.
"But when people look back a decade from now and see how well that it's doing no one will remember what the actual vote was," he said.
He said he did not want to make a judgment on who would be the next president of the US or who would be nominated by the Democrats or Republicans.
"But what I will do, if I can make a prediction on your show, is that I believe that this election will be about national security," he said.