Mueller says he didn't subpoena Trump "because of the necessity of expediting" the investigation. "If we did subpoena the president, he would fight the subpoena and we would be in the midst of the investigation for a substantial period of time."

NEW: Mueller says he didn't subpoena Trump "because of the necessity of expediting" the investigation.

"If we did subpoena the president, he would fight the subpoena and we would be in the midst of the investigation for a substantial period of time." https://t.co/LKxpESRMa4

— Axios (@axios) July 24, 2019