In an interview with NBC News, the president also said he assumes his relationship with the tech billionaire is over following their recent falling out.

U.S. President Donald Trump, in an interview with NBC News on Saturday, said there would be "serious consequences" if billionaire Elon Musk funds Democratic Party candidates to run against Republicans who vote for Trump's sweeping tax-cut bill.

Trump’s team is asking federal employees to develop rationales for funding cuts to the state, including citing noncompliance with the president’s executive orders.

The Trump administration is preparing to cancel a large swath of federal funding to California, an effort which could begin as soon as Friday, according to multiple sources.

The threat to cut off California follows a 315-page report published by the Federal Railroad Administration that claims California has missed several deadlines related to the high-speed rail and has failed to identify how it will secure $7 billion in funding to build a segment of rail between Merced and Bakersfield,