I said this when he first said he would run. He is limited by elections laws on how much he can donate, but if he runs for the office himself there is no limit. I figured he ran so he would not have any limit on how much he can donate to those running against President Trump. He is simply trying to buy the presidency for a Democrat, not necessarily himself. I don't think he even wants the position, he just wants President Trump out so he can move on with his agenda of using his wealth to transform America into a mirror of California as he said last week.
He has the same article on bloomberg web site, but I am not willing to give him any money in add revenue by linking to his site.