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, controversial high-speed rail project.

America’s first experiment with high-speed rail has become a multi-billion-dollar nightmare. Political compromises, including one to shift the route through Pacheco Pass to San Jose through Gilroy, created a project so expensive that almost no one knows how it can be built as originally envisioned.

Lawmakers and Gov. Gavin Newsom have different opinions on the best next steps for California’s high-speed rail project.