Special counsel Robert Mueller has requested interviews with current and former top intelligence officials, according to reports by The Washington Post and The New York Times.
Among those that Mueller is looking to interview are Director of National Intelligence Dan Coats, National Security Agency Director Admiral Michael Rogers and former NSA Deputy Director Richard Ledgett.
Mueller’s requests to interview the officials signals that his investigation is expanding to include the possibility that President Donald Trump tried to obstruct justice, according to The New York Times.
During a Senate Intelligence Committee testimony last week, Coats and Rogers repeatedly refused to answer lawmakers questions about their conversations with Trump in an open setting, though both said they never felt pressured by the President.
Coats, who said last week that he would be willing to discuss such matters in a closed setting, is set to speak with members of the committee in a closed session on Thursday, according to NBC news.
The question of whether Trump committed obstruction of justice has swirled in Washington since last month, when reports surfaced that the President had asked then-FBI Director James Comey in February to drop the investigation into former national security adviser Michael Flynn.
Deputy Attorney General Rod Rosenstein appointed Mueller to head the Russia investigation just a few days after Comey was fired on May 9.