The Senate Finance Committee is launching a bipartisan investigation into how a conservative think tank aided Maria Butina, the admitted Russian agent who sought political influence through her ties with the National Rifle Association.

Butina pleaded guilty to acting as a foreign agent in the United States in December, and her alleged Russian government handler, Alexander Torshin, was sanctioned by the U.S. in April 2018.

In a letter to Dimitri Simes, the CEO of the Center for the National Interest think tank, the committee requested records related to meetings Torshin and Butina had in 2015 with the Federal Reserve vice chairman and the Treasury Department undersecretary for international affairs.

Republican Chairman Chuck Grassley of Iowa and Democratic ranking member Ron Wyden of Oregon also sent letters to the Treasury Department and Federal Reserve to find out more about these meetings and to receive more details about their policies regarding meeting with foreign officials.