Via a reader tip comes this news that presidential advisor Moon Jung-in has been speculating recently that if President Moon Jae-in asks US forces to leave Korea, they should leave:

Moon Jung-in, special adviser to President Moon Jae-in, speaks during a recent seminar hosted by the National Committee on North Korea in Washington, D.C. / Yonhap

Moon Jung-in, mentor to President Moon Jae-in on foreign and North Korea affairs, often previews Seoul’s policy.

Now under question is his remark in a seminar in Washington, D.C., to the effect that U.S. forces should leave Korea, if its president shows the door. The comment was made in the context of explaining the structure under which the U.S. has wartime control of ROK forces.

The U.S. is said to be resistant to changing the structure, which would make the U.S. general subordinate to the Korean general.

Some experts say the U.S. would rather leave Korea than have its troops under ROK command.  [Korea Times]

You can read more at the link, but I would be surprised if the Pentagon signs on to any plan that allows a ROK general to command US forces.  ROK generals do not have the experience to command the hi-tech weapons, logistics, communications, and command & control systems that the US military brings to a fight.

This is why in the past it has been reported that if an OPCON change happens the US command will be downgraded to a three-star general in charge of an military organization called KORCOM.  ROK generals would take back control of all their forces during wartime, but would have no command authority over KORCOM.  Instead KORCOM would support the ROK military as needed.

If President Moon wants US forces out of Korea without explicitly demanding it; requesting that KORCOM fall under the command of ROK general would be the way to do it.