Looking at the three remaining candidates for the US presidency, I can only see one category where the Democrat challengers can beat Donald Trump:
A. BORING PREDICTABILITY
The winner is Bernie Sanders. The policy positions of a group think socialist never surprise anyone. These positions will astonish him if they ever get implemented and bankrupt America. Fortunately enough of the American electorate understand this; therefore his unelectability is as predicable as his dogma.
Runner-up: Joe Biden. Sleepy Joe has much more natural talent for boring people than Bernie. But his senile dementia means that everyone can have a lot of fun trying to guess what fact he will get wrong next.
Stone cold last: Donald Trump. The man is a gifted communicator who knows and loves his people. They love him back. He never had a chance in this category. He has revolutionised political communication. To the people.
B. GOVERNMENT EXPERIENCE
Donald Trump In this category lack of decades of experience in surviving in The Swamp is an advantage.
C. YOUTH and HEALTH
Trump, 74 years old. Proven strong under unrelenting pressure of a hostile media.
Bernie Sanders, a sprightly 78, when not hospitalised for a heart attack.
Joe Biden, 77 years old, but the senility factor cost Sleepy Joe badly in this race.
D. FORIEGN POLICY and NATIONAL SOVEREIGNTY
Trump. He negotiates. He knows how to build.
Biden. How can you protect or represent a nation when you might forget its name?
Sanders. You cant protect a nation and bankrupt it at the same time.