During episode 11 of the new Marvel/Netflix Series Luke Cage the main antagonist Diamondback tells a goon in reference to councilman Boone to
Take Diet Obama upstairs (03:24).
As pointed out in the comments, this is only one of several instances (for link to report see below).
So, I've seen this answer about President Ellis, and am now wondering: Luke Cage definitely seems like a part of the MCU, as there's plenty of cross-references and the titular hero already appeared in Jessica Jones. Is President Obama therefore part of the MCU now as well? If so, when was his presidency? Is he possibly the predecessor of Matthew Ellis? Otherwise, that reference seems a little out of place for a gangster in New York: It's not very likely that his men, who probably come from the street and didn't receive a whole lot of education, would know of a senator from Chicago, correct?
Might be an error by the writers, too...