So far, $15.7 billion has been invested in the project, with $2.7 billion spent by the federal government. Duffy said he is directing the Federal Railroad Administration to investigate whether the Trump administration should keep the Biden administration’s promise to give an additional $4 billion.

Duffy, speaking at Union Station in Los Angeles on Thursday morning, said the Federal Railroad Administration will review the rail project and its leadership.

The Federal Railroad Administration initiated a review of California's 400-mile high-speed rail project aimed at connecting Los Angeles to San Francisco following concerns voiced by the Trump Administration,

As President Donald Trump’s administration makes cuts to government programs, his head of the Department of Transportation announced that federal assistance intended for a major California

The transportation secretary, Sean Duffy, said the government would conduct a “compliance review” on a $3.1 billion grant, potentially threatening the viability of the troubled project.