U.S. Sens. Ron Johnson, R-Wis., chairman of the Senate Homeland Security and Governmental Affairs Committee, and Chuck Grassley, R-Iowa, chairman of the Senate Finance Committee, addressed the letter to Archivist David Ferriero.
In January 2016, Ukrainian governmental officials and corruption investigators met with members of Obama's National Security Council, the FBI, the DOJ and others, including DNC contractor Alexandra Chalupa, who has been suspected of working with Ukrainian officials to undermine the Trump campaign, the senators say.
"According to Andrii Telizhenko, a political officer in the Ukraine Embassy in Washington, D.C., who participated in a January 2016 meeting, 'U.S. officials volunteered ... that they had an interest in reviving a closed investigation into payments to U.S. figures from Ukraine's Russia-backed Party of Regions,' which refers to the investigation that involved Paul Manafort," the senators write.