Who is Keith Schiller, the latest White House aide to be questioned in Russia probe?

Schiller previously served as head of security for Trump's organization.

Schiller, now the White House director of Oval Office operations, has been by the president’s side for nearly two decades. Schiller got his start with Trump during his days as a real estate mogul back in the 1990s.

If not often heard, Schiller is often seen by the president’s side -- a visible and regular presence and trusted insider.

His start

Schiller would go on to join the Trump organization as a part-time bodyguard and would eventually rise through the ranks to the role of head of security at the organization.

Campaign

At Trump's urging, Schiller stepped in and physically escorted Ramos out of the room after the reporter repeatedly questioned Trump about his immigration plan.

Schiller also stole headlines for punching a protester outside of Trump Tower in another physical altercation caught on camera during the campaign.

White House

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