A White House staffer who has worked closely with President Joe Biden for years has revealed how the commander-in-chief's mental acuity has seemingly declined. A senior White House staffer who has worked with President Joe Biden for years revealed how the president's mental acuity has been declining in privateThe White House staffer concluded that the president should not seek re-electionLast month, the president apparently froze at a Juneteenth White House celebration. He was seen staring blankly ahead as Vice President Kamala Harris danced beside him. He appeared to be highlighting his appointment of Kamala Harris as the United States first black female vice president. But Biden himself was previously vice president, which is likely what he was referring to in 'to serve with a black president.'