Former acting attorney general Sally Yates, who is said to have told the White House that then-National Security Adviser Michael Flynn was vulnerable to blackmail, has been invited to testify publicly before Congress.

The Republican and Democrat leading the House Intelligence Committee probe of Russian election interference announced Friday they are seeking to schedule public testimony sometime after May 2 by Yates, as well as former CIA Director John Brennan and James Clapper, the former director of national intelligence.

All three former officials have insights into what the U.S. intelligence community knows about alleged contacts between Trump associates and Russians. Whether they can discuss any of that in public is another matter.

Shortly after Trump took office in January, Yates informed the White House she believed Flynn had misled senior administration officials about his communications with the Russian ambassador to the U.S., and warned that Flynn was potentially vulnerable to Russian blackmail, current and former U.S. officials told the Washington Post.

Yates was later fired by Trump after she refused to enforce his travel ban directed at Muslim majority countries.

Flynn was ousted after it became clear he had misled Vice President Mike Pence about whether he discussed sanctions with the Russian ambassador.