White House Office of the Press Secretary issued this on December 13, 2019:

POTUS Message to Congress on USMCA

I am pleased to transmit legislation and supporting documents to implement the United States – Mexico – Canada Agreement (the "Agreement"). The Agreement is an important part of my Administration's efforts to rebalance trade in North America and to modernize our trade relationship with Mexico and Canada. The Agreement will create significant new opportunities for American workers, farmers, ranchers, and businesses by opening markets in Canada and Mexico and eliminating barriers to United States goods, services, and investment.

Approving this Agreement is in our national interest. I look forward to the Congress expeditiously approving the legislation.

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https://publicpool.kinja.com/subject-message-to-the-congress-on-the-united-states-1840422259