Trump calls on Graham to demand Obama testify amid unmasking controversy: ‘Just do it’

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.”

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

The extraordinary demand comes as Trump has increasingly sought to link his predecessor to efforts to investigate his associates in 2016 and 2017, dubbing it "Obamagate." The tweet comes after Sens. Chuck Grassley, R-Iowa, and Ron Johnson, R-Wis., made public a list of Obama officials who purportedly requested to “unmask” the identity of Flynn, who at the time was Trump’s incoming national security adviser.