President Trump on Thursday pressed Senate Judiciary Committee Chairman Lindsey Graham to call former President Barack Obama to testify amid new developments surrounding the origins of the Russia investigation and efforts at the time to "unmask" Michael Flynn's name in intelligence reports.

“If I were a Senator or Congressman, the first person I would call to testify about the biggest political crime and scandal in the history of the USA, by FAR, is former President Obama,” Trump tweeted Thursday. “He knew EVERYTHING.”

GRAHAM TO SEEK TESTIMONY FROM TOP OBAMA OFFICIALS ON RUSSIA PROBE, COULD ISSUE SUBPOENAS

“Do it @LindseyGrahamSC, just do it,” he continued. “No more Mr. Nice Guy. No more talk!”