TORONTO (AP) " Canada's ambassador to Washington says the U.S. and Canada have made a lot of progress in free trade talks but there is no deal.

Ambassador David McNaughton said Sunday evening in Ottawa there are a couple of tough issues left to resolve. McNaughton says he isn't sure if they will reach an agreement by Monday but that he's cautiously optimistic.

The U.S. and Canada are under pressure to reach a deal by the end of the day Sunday, when the U.S. must make public the full text of the agreement with Mexico.

McNaughton adds that it's never done until its done.

Canada was left out when the U.S. and Mexico reached an agreement last month to revamp the North American Free Trade Agreement.