Simple Question: who was our last President that awarded himself a Medal for being President?

[link to www.breitbart.com]

On Wednesday, President Obama added another prestigious medal to his Nobel Prize collection when he had Defense Secretary Ash Carter award him with the Department of Defense Medal for Distinguished Public Service.

As distasteful as this is, Both George W. Bush and Bill Clinton also did the same exact thing.

[link to www.navy.mil]

[link to archive.defense.gov]

Simple Question: why doesn't congress control these medals?

PS yes I know there was another thread on this, however I am asking a serious if not simple question here, why isn't Congress overseeing this award?