Mr Trump said: "We are going to be issuing an emergency order of prohibition to ground all flights of the 737 MAX 8 and the 737 MAX 9 and planes associated with that line".
Canada's action followed confirmation that the pilot of Ethiopian Airlines Flight 302 reported internal control problems, while pilots in the US filed at least five complaints in recent months about the aircraft model.
Boeing had been gearing up for the much anticipated debut of its long-haul 777X aircraft this week but instead it's been left grappling with the grounding of almost two-thirds of its best-selling plane since the crash of an Ethiopian Airlines flight that killed 157 people. "What we can say is we don't have the capability to probe it here in Ethiopia", he said, adding that it would be sent to a European country that he did not identify.
Lebanon and Kosovo barred the Boeing 737 Max 8 from their airspace, and Norwegian Air Shuttles said it would seek compensation from Boeing after grounding its fleet. The order applies to all Max 8 and Max 9 versions of the popular airliner. However, German authorities said they would not conduct the decoding.
On Sunday, a Boeing 737 Max 8, operated by Ethiopian Airlines, crashed minutes after takeoff from Addis Ababa, Ethiopia, killing all 157 people from more than 30 countries on board. According to a preliminary investigation by Indonesia's airport authority, the plane's sensors were showing incorrect speed and altitude readings during another flight hours before the disaster.
Air Canada and rival WestJet Airlines operate a total of 37 Boeing 737 Max jets.
Boeing donated $1 million to Trump's inaugural fund and the two men met later at Trump's Mar-a-Lago resort in Florida to discuss the new Air Force One presidential aircraft that Boeing is constructing.
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Sao Paulo Governor Joao Doria said as he stood outside the school that "our solidarity goes out to the families of the victims". Latin America's most populous nation has the largest number of annual homicides in the world, but school shootings are rare.
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The Bills' leading receiver last year was second-year player Zay Jones, who posted 56 receptions, 652 yards and seven touchdowns. Beasley has appeared in 103 games with the Cowboys, bringing in 319 passes for 3,271 yards and 23 touchdowns.
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Several defendants, including Huffman, were charged with conspiracy to commit fraud, punishable by up to 20 years in prison. A former Yale soccer coach had pleaded guilty before the documents went public and helped build the case against others.
Will Sunday's crash affect confidence in modern air travel?
I am sure everyone is keen to see the results of both investigations, so that targeted action can be taken to assure the ongoing safety of flight.
Given problems of identification of charred remains, it will take days to start returning them to families, probably weeks for some which will require dental or DNA testing.
The crash came a month after the Lion Air crash in October involving the same model aircraft. Most are piloted by Southwest.
The Federal Aviation Administration said a review had showed "no systemic performance issues" and that there was no basis for grounding the aircraft.
Boeing immediately responded with a statement of its own backing the decision, as if it had any real choice or say in the matter.
Though there are no proven links between the two recent 737 MAX crashes, the United Arab Emirates' aviation regulator said on Tuesday there were "marked similarities" and China's regulator noted both occurred shortly after take-off.