the real reason is he's a liar ,a cheat ,a criminal , a big spender , he reduces taxes on the rich , a loose cannon and because he tries to stay on ...plus he's OLD and he mixes things up four years time he'll be older than Biden is now
plus he had his doctor invent bone spurs to avoid his duty to his country and then insults good men like McCain
but that's just the summary ....there is a lot more