A proposed trilateral trade agreement between the U.S., Mexico, and Canada is set to fail in Congress if the Trump administration pushes a vote in the next few months, the president of the AFL-CIO said April 1.

A draft USMCA agreement was signed in 2018. If ratified by Congress, it would replace the North American Free Trade Agreement that went into effect in 1994. President Donald Trump has frequently criticized NAFTA and promised during his campaign that he would either...