One byproduct of what some are calling "Oldgate" - a panic over Special Counsel Robert Hur's suggestion that President Joe Biden is an "elderly man" with memory issues - has been media efforts to understand and explain how Democrats could replace the 46th president as their 2024 nominee, either with or without his consent. From a political perspective, the idea that Biden might be dumped from the ticket is extremely far-fetched. But technically it is possible, though increasingly complicated, right up to Election Day.