By David Shepardson and Alexandra Alper
WASHINGTON, Jan 26 (Reuters) - Prominent U.S. business leaders expressed support for key parts of President Joe Biden's proposed $1.75 trillion spending bill on climate and social programs even as it faces an uncertain future in Congress.
The White House is still pushing to win approval for more than $500 billion to tackle climate change and boost electric vehicles along with hundreds of billions of dollars for universal preschool, paid family leave and other social safety spending.
"I offer a full-throated endorsement of the climate provisions," Microsoft President Brad Smith said at a White House meeting, adding the United States needs to do more to bring more Americans back to work "and people can only come back to work if they have a way to take care of their children."
He praised the bill's focus on job training and efforts to boost child care. Smith also praised aspects of the bill that would boost sustainable aviation fuel.
General Motors CEO Mary Barra noted the Detroit automaker is making big investments in EV and it needs key provisions in the proposal "that are going to uncap EV credits."
Cummings CEO Tom Linebarger said the engine manufacturer is pursuing clean technology initiatives.
"We can't do it alone. The truth is we need tax credits in the Build Back Better act for hydrogen and clean trucks," he said at the event.
Biden would increase the current $7,500 EV tax credit to up to $12,500 for union-made U.S. vehicles and create credits of up to $4,000 for used vehicles. The bill would also again make GM and Tesla Inc eligible for tax credits after they hit the 200,000-vehicle cap on the existing $7,500 credit.
The $4,500 union EV credit has come under heavy criticism from foreign automakers.
The bill also includes a 30% credit for commercial electric vehicles. Build Back Better would allocate $3.5 billion for converting U.S. factories for production of electrified or fuel cell vehicles and revive incentives that could generate $3.7 billion for automotive communities by 2031.
"It is vital that we have that (EV manufacturing) in the United States," Barra said Wednesday. She called $52 billion in separate proposed funding for semiconductor production "a national imperative." (Reporting by David Shepardson Editing by Chizu Nomiyama)