WASHINGTON, (Reuters) – More than 100 U.S. House members urged Nancy Pelosi Tuesday to maintain a $4500 tax credit for electric vehicle (EV) constructions by unions in a huge spending bill.

Reuters obtained a copy of Reuters’ letter in which Democrats urged Pelosi not to withdraw the support for the credit by the United Auto Workers union, and the AFL-CIO. Detroit’s three largest automakers would see significant growth with the credit of $4,500 — General Motors Co. (NYSE:), Ford Motor. (NYSE:) Co. and Chrysler-parent Stellantis.

We strongly support equalizing the playing fields between non-unionized workers and unionized ones by including an additional $4,500 incentive to help union-made EEVs,” said the letter.

Tesla (NASDAQ:) Inc, and other foreign automakers don’t have unions that represent assembly workers in America. Many have also fought attempts to organize U.S. factories.

Last month, 12 major foreign automakers, including Toyota Motor (NYSE) Corp, Volkswagen AG, Motor Motor, Honda Motor Motors, Hyundai Motors, Nissan Motors and Nissan Motors (OTC) Motor urged Democrats against the proposed tax incentive of $4,500.

Last month, a House panel approved legislation that would increase EV credits up to $12,500 per car, which includes $4,500 for vehicles made by unions and $500 for batteries manufactured in the United States.

According to foreign automakers, the proposal “would unfairly prejudice American workers who choose not to join a labor union and produce over half of the United States’ vehicles and the vast majority American-made EVs.”

One-time $15.6 billion would be spent over 10 years on tax credits that are part of the $3.5 trillion spending plan.

The EV proposal does not allow for the phasing of tax credits until automakers sell 200,000 electric vehicles. That would make GM, as well as Tesla, eligible once more. Tesla will still receive the $4500 credit.

Elon Musk, Tesla CEO, stated on Twitter (NYSE 🙂 that the EV plan was written by Ford/UAW lobbyists… Unclear how this will benefit American taxpayers.”