Remarks by the President at Presidential Medal of Freedom Ceremony | The White House

This looks like it happened yesterday.

I agree it is a stupid mistake. "Polish death camp" controversy - Wikipedia, the free encyclopedia

I suppose it is repeated here, however, in the Jewish Virtual Library--
Extermination Camps in Poland

This is an interesting petition about banning this phrase from the journalism style manual-- Associated Press bans phrase “Polish death camps” | Forum Polonia Houston

The Kosciuszko Foundation - Petition on German Concentration Camps

You can sign this petition to remove the phrase from proper journalism on the Kosciuszko Foundation link above. Think it should read Nazi Concentration Camps though.