In the letter, Assistant Attorney General Peter Kadzik wrote that DOJ would "work closely with the FBI" to "dedicate all necessary resources and take appropriate steps as expeditiously as possible."
The letter was sent to six lawmakers, according to a Washington Post report, including Sens. Pat Leahy (D-VT), Tom Carper (D-DE), Dianne Feinstein (D-CA) and Ben Cardin (D-MD).
Over the weekend, the Democratic senators sent a letter to Attorney General Loretta Lynch and FBI Director James Comey calling for "more disclosure without delay" regarding Comey's Friday announcement about the newly discovered emails.
Read the letter below: