Trump and Melania are paying a three-day state visit to China from Wednesday to Friday.
Trump said he would speak with Canadian Prime Minister Justin Trudeau in a little while and hoped to resume negotiations with Canada soon.
Trump told supporters in Montana on Thursday that Republicans needed to maintain control of Congress to stave off possible impeachment proceedings against him, although Democrats have played down any discussion of that approach.
Trump said he felt "really good" and will leave Walter Reed National Military Medical Center at 6:30 p.m. (2230 GMT). Trump has been at the hospital since late Friday.
Trump has directed US Trade Representative Robert Lighthizer to publish a list of proposed Chinese goods that could be subject to tariffs in 15 days, while the US Treasury Department will have 60 days to propose restrictions on Chinese investment in the United States.
Trump, who spoke with Democratic House Speaker Nancy Pelosi on Wednesday, told reporters he believed Pelosi "wants to get something done". Pelosi called Trump on Wednesday to "try to reconcile" the House and Senate bill, a senior Democratic aide said. Senate Democratic Leader Chuck Schumer said Pelosi suggested a few changes, but Schumer did not outline them.
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Trump said he 'absolutely' would invite Kim to the White House.
Trump also said on Monday that the federal government should support airlines "very strongly" amid the losses they are taking because of the coronavirus.
Trump has announced tariffs - mainly intended for China - of 25 percent on imported steel and 10 percent on aluminum.
Trump's commerce secretary, Wilbur Ross, said earlier on Monday it was too soon for the United States to discuss any withdrawal from the World Trade Organization.