White House aides have revealed what it’s really like to work with Joe Biden. In a new article, the staffers confessed that the President, 81, can only work about six hours a day when he is most coherent. The headline, “Two Joe Bidens: The night America saw the other one,” exposed how the top White House aides work “meticulously” to keep the public’s exposure to the father-of-four limited to between 10 a.m. and 4 p.m. The report read: “Between the lines: Biden’s miscues and limitations are more familiar inside the White House. The time of day is important as to which of the two Bidens will app…