WASHINGTON — As Donald Trump delivered his presidential inaugural address last January, his national security adviser Michael Flynn told a former business associate in text messages that a private plan to build nuclear reactors in the Mideast was “good to go” and that U.S. sanctions hobbling the plan would soon be “ripped up,” a whistleblower told congressional investigators.

The witness did not specify which sanctions Flynn was referring to in his texts. But the nuclear project that Flynn and his business associate had worked on together was stymied by U.S. financial sanctions on Russia.

The witness’s account, made public Wednesday by the ranking Democrat on the House oversight committee, raises new concerns about the extent to which Flynn may have blurred his private and public interests.

Maryland Rep. Elijah Cummings, the ranking Democrat on the Committee on Oversight and Government Reform, said Wednesday the whistleblower’s allegations raise concerns that Flynn improperly aided the nuclear project after joining the White House as one of Trump’s top national security officials. The project has yet to get off the ground.

Cummings detailed the whistleblower’s allegations in a letter to committee chairman Trey Gowdy, R-S.C., and urged Gowdy to authorize subpoenas to Flynn and his business associates to learn more about his efforts.