President-elect Joe Biden on Jan. 8 formally introduced Boston Mayor Marty Walsh as his selection to be the next labor secretary.

“Marty understands like I do that the middle class built this country, and unions built the middle class,” Biden said.

“Workers need a champion in Washington — and Marty Walsh would be a crucial addition to an administration dedicated to fighting for the forgotten and rebuilding an enduring middle class,” said AFT President Randi Weingarten in a statement. “The path to a better America runs through the labor movement, as the largest organized force for equality and justice. With Marty’s confirmation, workers will have a trusted partner at the Department of Labor to get the job done.”