President Trump’s controversial imposition of tariffs on steel and aluminum imports, which critics warn could trigger an international trade war, has found a new vocal supporter: labor union leader James Hoffa.

Hoffa, president of the International Brotherhood of Teamsters (IBT), promised that Trump’s tariffs will not only bring jobs back to the U.S., but will protect the country’s national security interests. The IBT represents more than 1.3 million members in both blue-collar and professional workers in the private and public sectors.

“There’s a national emergency right now to protect American jobs,” Hoffa told FOX Business’ Maria Bartiromo during an interview on Wednesday. “We need steel for national security, we need aluminum. We need to have strong, strong companies here. This is the beginning of something that will save American jobs and protect American security.”