President Trump on Thursday criticized Susan Rice for refusing to testify before a Senate subcommittee about alleged Russian meddling in the 2016 presidential race.

"Susan Rice, the former National Security Advisor to President Obama, is refusing to testify before a Senate Subcommittee next week on........allegations of unmasking Trump transition officials," the president tweeted.

"Not good!"

Susan Rice, the former National Security Advisor to President Obama, is refusing to testify before a Senate Subcommittee next week on..... — Donald J. Trump (@realDonaldTrump) May 4, 2017

...allegations of unmasking Trump transition officials. Not good! — Donald J. Trump (@realDonaldTrump) May 4, 2017

ADVERTISEMENT

Rice, a national security adviser under former President Barack Obama Barack Hussein ObamaDemocratic Senate campaign arm outraises GOP by M in August A federal court may have declared immigration arrests unconstitutional Blunt says vote on Trump court nominee different than 2016 because White House, Senate in 'political agreement' MORE, declined an invitation from Sen. Lindsey Graham Lindsey Olin GrahamMcConnell locks down key GOP votes in Supreme Court fight Will Republicans' rank hypocrisy hinder their rush to replace Ginsburg? Momentum growing among Republicans for Supreme Court vote before Election Day MORE (R-S.C.), the chairman of the Senate Judiciary subcommittee on crime and terrorism.

According to a letter sent by her lawyer, Rice refused to testify because the senior Democrat on the subcommittee was not involved in the invitation.

“Senator [Sheldon] Whitehouse [D-R.I.] has informed us by letter that he did not agree to Chairman Graham’s invitation to Ambassador Rice, a significant departure from the bipartisan investigations extended to other witnesses,” Rice’s lawyer, Kathryn Ruemmler, wrote in the letter, which was obtained by CNN.

“Under these circumstances, Ambassador Rice respectfully declines Senator Graham’s invitation to testify.”

Last month, the president accused Rice of improperly unmasking U.S. citizens, specifically members of his campaign, caught up in incidental surveillance of foreign agents.