Two of the top Republicans on the Senate Judiciary Committee are calling on former Obama national security adviser Susan Rice to explain an “unusual email” she sent on the day of President Trump’s inauguration.

On January 20, 2017, hours before she left the White House for good, Rice emailed herself a report of a meeting that had happened more than two weeks before. That meeting concerned potential Russian collusion with the Trump campaign and was attended, according to Rice’s email, by President Obama and senior Department of Justice officials, including then-FBI director James Comey and then-deputy attorney general Sally Yates.