President Donald Trump took to social media to slam the Gateway Tunnel rail project as a “boondoggle” that he said, without evidence, would run billions of dollars over budget.

The president’s post, on his social media site Truth Social, comes as his administration continues to withhold most federal funding for the massive infrastructure project. The comments come days after his administration paid the first portion of $205 million in reimbursements it owes to the GDC for the project, equalling $30 million.