1) Americans are racist and sexist. A woman cannot win the White House until a woman wins the White House.
2) He plays identity politics very effectively
7a) Kamala has confusing identity.
3) He starts with an unmovable 46%-47% share.
4) Advantage in the Electoral College.
5) He has been running continuously for eight years.
6) Every lie gets amplified and becomes the Big Lie that people believe, e.g. the economy sucks, everything was better in his first term, Haitian immigrants are eating pets, the Biden admin was AWOL on Hurricane Helene
7) Gresham's Law. Bad money drives out good money. Lies drown out truth.
8) Kamala's second half campaign has not been effective.
9) Kamala's huge financial advantage has not overcome trumpie's free media.