"It also risks further damaging the already strained relationship between the US and Mexico, two countries whose economics are deeply intertwined", adds the AP.
Seade said Mexico "will respond energetically" if the tariff takes effect, but added that it will seek talks with the Trump administration before retaliating.
They travel through Mexico on their way to the United States where they hope to claim asylum.
And he has been itching to take increasingly radical, headline-grabbing action on the issue, which he sees as critical to his re-election campaign because it energizes his base.
Cramer said that "markets may be wrong" since traders did not think the president would follow through on threats to hike tariff rates to 25% on $200 billion of Chinese goods.
The move, which has major implications for American automakers and other companies with production south of the border and the US economy as a whole, represents Trump's latest expansion of his trade wars. In Mexico, the agreement will have to go through three Senate committees, but after that, "a simple majority vote wins approval, so we're sure it will pass the Senate" and be ratified, Lopez Obrador said.
"The drama is legal, but it's preposterous", he said.
He said he believed the USA leader would understand in due course that the tariff threat was not the way to resolve the matter and stressed that Mexicans had united behind his government.
Durant officially to miss finals opener
But just because Toronto is at home and feeling like a team of destiny doesn't mean it'll cover the Warriors vs. The fact there's a lot of days in between games in the Finals helps us.
"Because of the Dems, our Immigration Laws are BAD", Trump tweeted.
Donald Trump on Thursday kick-started the process of ratifying the new North American trade pact, but the U.S. president put the accord at risk by announcing tariffs on Mexico over illegal immigration. It was unclear, however, what Mexico had changed.
It's unclear whether the announcement will have any impact on the new United States-Mexico-Canada trade deal.
Indeed, on a briefing call with reporters Thursday evening, acting White House chief of staff Mick Mulvaney said there were several things Mexico could do to prevent the tariffs from kicking in.
Still the threat drew a withering response from Republican Sen. Joni Ernst, asked Trump to reconsider the move, highlighting in a statement released Friday morning the damage the tariffs and the collapse of the trade agreement would inflict on American agriculture.
A source close to Trump said there had been an internal debate inside the White House over whether to go forward with the new policy, with immigration hawks fighting for it and others urging a more diplomatic approach. All U.S. -made cars now include at least some parts from overseas, and 37% of those parts are from Mexico.
An increasing number of migrants from Central America have been arriving to the United States border with Mexico in recent months.
He wrote that Mexico has not been treating the United States "fairly" for many years by failing crack down on the surge of Central American migrants from countries including El Salvador, Honduras and Guatemala, and that "It must end NOW!"
But Trump's tariffs, which he says would start at 5% on June 10 before escalating to as much as 25%, are effectively a tax on imports.