Toyota Motor Corp (7203.T) said on Saturday that  it will sharply oppose a proposal by Democrats in the US. House of Representatives to give union-made electric vehicles in the United States an additional $4,500 tax incentive.

Japan’s largest automaker said the plan unveiled late Friday discriminates “against American autoworkers based on their choice not to unionize.” The bill, set to be voted on Tuesday by the Democratic-led House Ways and Means Committee, would benefit Detroit’s Big Three automakers, which have union-represented auto plants.

Toyota added that it will also “fight to focus taxpayer dollars on making all electrified vehicles accessible for American consumers who can’t afford high-priced cars and trucks.”