Canadian Ambassador to the United States David MacNaughton said heā€™s ā€œecstaticā€ that the White House lifted its tariffs on Canadian steel and aluminum, and he expects the new NAFTA agreement to become official this summer.

In an interview with CTVā€™s Question Period, MacNaughton said he expects U.S. Congress to pass the renegotiated USMCA deal (or CUSMA, as itā€™s known in Canada) by the end of July, when the summer sessions wraps up.

ā€œIā€™ve spent a lot of time on the Hill talking to people, including a lot of Democrats, and I think this tariff resolution is going to give the impetus to get this deal done. And I am extraordinarily pleased that this has happened,ā€ MacNaughton said in an interview that airs Sunday.

The ambassador was one of several key members of what he called ā€œteam Canadaā€: a group of top cabinet ministers, public servants and industry stakeholders lobbying U.S. officials to eliminate the tariffs, which were put in place one year ago during NAFTA talks.

ā€œWe were just determined and persistent and unwavering and ā€¦ as in the NAFTA negotiations, it was team Canada at its best.ā€

U.S. President Donald Trump campaigned in 2016 on a platform that included killing NAFTA and replacing it with a ā€œbetterā€ deal for Americans. But Canadaā€™s NAFTA negotiators, including Foreign Affairs Minister Chrystia Freeland, said they refused to sign any deal that wasnā€™t mutually beneficial.

Ottawa responded to the U.S. tariffs last May with $16.6-billion worth of countermeasures against a long list of American imports, including products such as bourbon, boats and pens.

The year-long stalemate wasnā€™t broken on a single issue, MacNaughton said. Rather, he said that he and other Canadians repeatedly told U.S. officials that Parliament simply could not pass the new deal with trade barriers in place.

ā€œAnd I donā€™t think they believed me, but I honestly believed it. I didnā€™t think the government or Parliament would pass the legislation as long as this was around.ā€

MacNaughton also cited key support from influential Republicans, including Iowa Senator Chuck Grassley and Kansas Senator Pat Roberts, who opposed the tariffs.

ā€œWe had people on both sides of the floor saying, ā€˜You need to get these things out of the way.ā€™ā€

The Trump administrationā€™s decision to drop the tariffs marks a significant win for the federal government. On Friday, Prime Minister Justin Trudeau called the news a "good day for steel and aluminum workers right across the country."

Hours after the announcement, U.S. Vice-President Mike Pence said he was coming to Ottawa on May 30 to sit down with Trudeau to move forward with the USMCA deal ā€œas swiftly as possible.ā€ Pence described the deal as

Sources have told Ā鶹“«Ć½ that the U.S. and Mexico have also reached a similar agreement.

From MacNaughtonā€™s point of view, the White Houseā€™s decision to scrap the tariffs proves that persistence pays off.

ā€œWeā€™re only 35 million people. But when we work together, thereā€™s almost nothing we canā€™t do,ā€ he said. ā€œI say to the Americans: weā€™re really nice people, weā€™re really fair people and weā€™re really reasonable people. But weā€™re also hockey players, so.ā€

Asked if heā€™s concerned that Andrew Scheerā€™s Conservatives could change the deal if they win the election this fall, MacNaughton refused to comment.

ā€œAs a non-partisan public servant, I donā€™t think itā€™s appropriate for me to comment on Canadian politics.ā€

As for when Canada will approve the deal, MacNaughton said he expects the federal Liberal government to introduce its own legislation ā€œvery, very shortly.ā€