Trump's prime-time address will be carried live by ABC, CBS, CNN, Fox Broadcasting, Fox News Channel, Fox Business Network, MSNBC and NBC.
Trump now joins two other presidents who were impeached but acquitted: Andrew Johnson in 1868 and Bill Clinton in 1999.
Trump campaigned on the promise of keeping more jobs in the US, but reports said his supporters wore "Make America Great Again" hats that were made in China.
Trump ended his letter by saying, "One hundred years from now, when people look back at this affair, I want them to understand it, and learn from it, so that it can never happen to another President again.''
Trump added: "We have the best economy we've ever had, we have the best job numbers in 51 years, the best unemployment numbers that we've had in half a century. People are working. They're making money."
Trudeau also expressed his condolences for the victims of the shooting at the Capital Gazette newspaper in Annapolis, Maryland, the Canadian statement said.
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Trump prevailed over his Democratic rival Hillary Clinton in November 2016 because he ran a "smarter campaign" and to suggest otherwise "ridicules those who voted for him,” he said.
Trump said that African Americans were being hit hard by the coronavirus, representing a "tremendous challenge" for the nation.
Trump hosts swearing-in of Supreme Court judge amid split
Trump called the action "currency manipulation" and said it was an attempt to steal US jobs and depress wages. The Treasury Department designated China as a currency manipulator, but the US can't seek formal penalties until it attempts to strike a deal with China.