Trump said he would name Bolton's successor next week. The White House said Charles Kupperman, the deputy national security adviser, would fill Bolton's role on an acting basis.
Trudeau also said his government has signed billions of dollars worth of agreements to buy vaccines, therapeutics, and personal protective equipment. Canada faced critical shortages of gloves, masks and gowns in the early days of the pandemic.
Trump listed Ukraine, Syria and other parts of the Middle East and nuclear proliferation as some key issues for the talk.
Trump also said after his speech that Pompeo is on the way to the Democratic People's Republic of Korea (DPRK) to prepare for his meeting with the country's top leader Kim Jong Un.
Trump and his administration has been pressuring schools to reopen in fall, threatening to withhold federal funding from schools that do not comply. Reopening schools is seen a crucial step to restarting the country's economy for his reelection campaign.
Trump arrived at Hanoi's Noi Bai International Airport on Tuesday evening. He has expressed optimism about his upcoming talks with Kim, and tweeted aboard Air Force One, "Heading over to Vietnam … Looking forward to a very productive Summit!"
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Trump is accused of pressuring Ukraine to initiate a probe of a Democratic political rival and then of obstructing Congress' efforts to investigate his actions.
Trump said Comey's testimony also vindicated him fromal legations that he colluded with Russian meddling in the 2016 US presidential election.
Trump drew a firestorm of criticism last year following the deadly incident in Charlottesville when he said "both sides" were to blame for the violence.
Trong said he was both happy and worried. "I am happy because I have been trusted and loved by the National Assembly and assigned tasks. I am worried about how to fulfil the heavy tasks before the country," he said when taking the oath.