President Trump ramped up his feud with House Oversight Committee Chairman Elijah Cummings, D-Md., on Sunday calling the congressman “racist,” not long after critics had claimed the president’s initial tweets about Cummings were racist themselves.

Trump tweeted Sunday afternoon, “If racist Elijah Cummings would focus more of his energy on helping the good people of his district, and Baltimore itself, perhaps progress could be made in fixing the mess that he has helped to create over many years of incompetent leadership.”

He added, “His radical ‘oversight’ is a joke!”

The day before, Trump also called out Cummings, calling him a “brutal bully” for how he spoke to border patrol officials. Trump said the congressman’s Baltimore district was in “FAR WORSE” shape than the situation at the southern border.

That rebuke resulted in claims of racism from Democrats, including House Speaker Nancy Pelosi. Trump hit back, citing claims of racism against Pelosi from some progressive Democrats.