After weeks and months of President Donald Trump characterizing former Vice President Joe Biden as an senile old man who can’t string two sentences together, his campaign has finally realized that they should start raising expectations for his performance at the first debate this Tuesday night.Apparently, Donald Trump Jr. didn’t get the memo.The president’s eldest son kicked off his Fox & Friends appearance by attacking CNN’s Jake Tapper for not pressing Jill Biden harder on her husband’s history of making “gaffes” during an interview on State of the Union Sunday. “Once a Democrat operative, all of it—always a Democrat operative,” he said, unconvincingly.“Joe Biden can’t remember where he is 50 percent of the time,” Trump Jr. declared. “He forgets the office that he’s running for.” He added, with no sense of irony, “If Donald Trump made one Joe Biden-type error, once, it would be all over! Joe does it every day.”“So that’s why he’s in debate prep,” he continued, mocking his father’...