IMO it is because that is the scenario they have orchestrated and been pushing, so they have to keep to it. They know Hillary is not fit to become president, and again IMO they have no intention of allowing an election. My guess is they will pull off a very terrifying false flag in the USA at the appropriate time just before the election, probably having to do with the death of one or both candidates, giving Odildo the excuse to declare Martial Law, cancel the election, and remain the president for a third illegal term.
I’d love to be proven wrong and see Trump win by such a landslide they could not overcome it even with massive voter fraud but the closer we get the more plausible it becomes in my thinking.