The AFL-CIO, the nation’s largest federation of labor unions, won’t support the USMCA trade agreement if an early vote is pursued, the organization announced March 14.

The federation’s executive council voted to oppose the deal after a two-day meeting, saying that it lacks sufficient enforcement mechanisms that would strengthen labor conditions in Mexico.

The United States-Mexico-Canada Agreement, if ratified, would replace the existing North American Free Trade Agreement.

More work needs to be done to strengthen the USMCA’s labor rules, including adding mandatory monitoring and reporting of labor conditions, the AFL-CIO Executive Council said in a statement.

The statement comes...