The White House was reportedly feeling out Rick Perry to take over from Shulkin at the Department of Veterans Affairs.
VA Secretary Dr. David Shulkin ousted three regional directors in a bid to save his job.
Shulkin and Missal were at odds again Wednesday -- this time over conditions at the Washington, D.C., VA Medical Center.
Investigators didn't find any evidence Wright Simpson's email was compromised near the time of the July trip.
The military services are getting better at transferring medical records to the VA.
White House Chief of Staff John Kelly met with veterans groups on the turmoil at the VA.
VA Secretary Dr. David Shulkin said he has the president's backing to stay on the job.
Shulkin said he would be staying on despite the uproar over his travel expenses and now had approval to clean house.
The White House declined to express confidence in embattled VA Secretary David Shulkin.
Peter O'Rourke, who leads VA's new accountability office, will now be its permanent chief of staff.