The United Auto Workers chief warned Sunday that a historic strike at the top three car manufacturers will expand if the companies do not raise their wage offers in ongoing negotiations.

Stellantis, one of the three, had offered its workers what it called a "highly competitive" wage increase of 21 percent over four years, but UAW President Shawn Fain called that "definitely a no-go."

"If we don't get better offers and ... take care of the members' needs, we're going to amp this up even more," Fain told CBS News' "Face the Nation," saying General Motors, Ford, and Stellantis have "no excuse" for not resolving salary disputes given their massive profits of recent years.

"We're prepared to do whatever we have to do. The membership is ready; the membership is fed up."... Read More: Newsmax