Trump said he is “considering allowing a major lawsuit against Powell to proceed” over what he called “the horrible, and grossly incompetent, [sic] job he has done managing the construction of the Fed Buildings,” he wrote Tuesday on Truth Social.

Trump repeated his preferred attack lines against Powell, referring to him as “too late” while pressuring him to lower the interest rate.

The Federal Reserve renovations have become the latest target for Trump and his allies amid Trump’s ongoing feud with Powell, who he has repeatedly urged to resign and threatened to terminate, though it’s unclear if he has the legal authority to do so.

Trump in July called for a probe into the renovations at the Federal Reserve, a project that has run about $600 billion higher than its initial estimate, according to the Fed.

Trump and Powell openly bickered about the renovations when Trump visited the construction site for a tour led by Powell last month, and Trump claimed the project was estimated to cost $3.1 billion, prompting Powell to shake his head and correct Trump, telling the president his figure also included the cost of renovations to another Fed building.

Trump alleged in his Truth Social post on Tuesday the renovations will cost $3 billion “for a job that should have been a $50 Million Dollar fix up.”