Elon Musk, Tesla's CEO, has criticized a bill that could benefit electric-vehicle manufacturers with unions.
Democratic House lawmakers on Friday put forward a bill that would give a $4,500 tax incentive to consumers buying electric vehicles assembled at US facilities with a union.
Musk tweeted on Sunday that the bill had been engineered by lobbyists for Ford and the United Auto Workers union.
"This is written by Ford/UAW lobbyists, as they make their electric car in Mexico. Not obvious how this serves American taxpayers," the Tesla billionaire tweeted, linking to a Bloomberg article about Ford's production of its Mustang Mach-E cars at its Mexico plant.
The $4,500 incentive could give an advantage to unionized US automakers such as GM, Ford, and Chrysler, while Tesla — which has historically opposed unionization — could lose out.
Musk did not provide any evidence of lobbying by Ford and UAW. A UAW spokesperson did not respond to Musk's comments when asked by Insider, but he highlighted a statement from UAW President Ray Curry praising the bill.