State Sen. Jamilah Nasheed, D-Mo., is the first lawmaker to call for Missouri Gov. Eric Greitens to resign after reports that he blackmailed a woman he had an extramarital affair with shortly before he launched his 2016 campaign.

"WE MUST END THE CULTURE OF CORRUPTION. I'm calling on Governor Greitens to resign immediately and give Missouri the opportunity to restore some dignity to the governor's office," Nasheed tweeted late Tuesday.

Another Missouri politician, House Assistant Minority Leader Gina Mitten, said the news "undermines his [Greiten's] credibility."

"With the governor’s reliance on secretive dark money, his alleged destruction of public records, and overall lack of transparency, deception has been a key part of Eric Greitens’ administration," said Mitten, a Democrat.

Greitens, a 43-year-old former Navy SEAL who became governor a year ago, admitted after his State of the State address Tuesday evening that he had had an affair prior to becoming governor.

However, the ex-husband of the unnamed woman who had been involved with Greitens told St. Louis CBS affiliate KMOV that there was more to the story.

He said his wife had gone over to Greitens' house in March 2015. He tied her to a piece of exercise equipment in his basement, put a blindfold on her, and partially undressed her. He then took a picture of her, which she realized after seeing a flash of flight through the blindfold.

Her former husband said she never consented to that photo, which Greitens is alleged having used to keep her from going public with the affair.