Mr. Trump called Trudeau "very dishonest & weak" for his objections to the US tariffs.
"I'm not sure what activity he's asking me to undertake with either", May said amid laughter.
He made the apology - something that former US ambassador to Canada Bruce Heyman, among others, was demanding that he do - during a Wall Street Journal event today in Washington. "In conveying that message I used language that was inappropriate".
But when Trudeau said Canada would be forced to retaliate for USA tariffs on steel and aluminum and would not agree to a sunset provision in a new North American Free Trade Agreement, "he really kind of stabbed us in the back", Kudlow said.
FILE - Senior White House economic adviser Larry Kudlow speaks during a briefing at the White House in Washington, June 6, 2018.
As for Trump's own response, he predicted that Trudeau's remarks are going to cost Canada "a lot of money".
Trudeau struck a steady-as-he-goes pose after Trump's latest dig, telling reporters, "I'm going to stay focused on defending jobs for Canadians and supporting Canadian interests".
After (apparently) watching a Trudeau press conference on Air Force One, Trump took to Twitter to attack the Canadian Prime Minister.
"He's giving a news conference about how he will not be pushed around by the United States".
"Let me correct a mistake I made", Navarro told the audience at the Wall Street Journal's annual CFO Network conference Tuesday. European Council President Donald Tusk tweeted: "There is a special place in heaven" for Trudeau.
The country has rallied together, with public opinion polling showing there's wide support for Canada's retaliatory tariffs against the steel and aluminum duties that will kick in for some US goods on July 1.
The prime minister's silence on Monday came in sharp contrast to a roar of disapproval among Canadian politicians, who banded together across party lines to denounce Trump's attack and praise the bilateral and trading relationship between the two neighbours.
The Trudeau hate began after the Prime Minister held a press conference and told reporters that the new US tariffs on steel and aluminum are "kind of insulting" and that Canada "will not be pushed around". She also said the European Union would "act" against the USA trade measures.
"Sorry, we can not let our friends, or enemies, take advantage of us on trade any more".
"Because they know that the words that are coming out of the president of the United States' mouth are not necessarily the feelings of those of us who value our relationships with our neighbours to the north". "It was very friendly", Mr Trump said.
A Trump adviser had suggested Sunday that Trump saw Trudeau as trying to weaken his hand before the meeting with Kim.