There was a long list of accusations ranging from his handling of public funds to altering business records. I think the American supreme court is suspicious of him committing fraud or embezzling public money.
I make an effort not have an opinion about politicians. I tend to favour the Republican party because they don't want to increase the abortion window into the 3rd trimester and they support the police force and things like that but generally I don't really have much of a view. It doesn't matter because I'm British anyway, it has nothing to do with me.