I am convinced the supposed hackers, as identified by krebsonsecurity, are patsies. The purpose of the attack was to undermine confidence in Twitter as a platform, which is why the attack was intentionally amateurish.
It's a false flag operation. Trump realized that his tweets have become a political liability, so he had this done so that he can claim that someone hacked his account and posted all this weird stuff on it.
[Me takes off tinfoil hat.]
More seriously, what would the point be? Stock price manipulation? Making users think about moving to another platform? Political? International espionage?
[Edit: Since everyone seems to have missed it, the part inside the "tinfoil hat" blocks was not intended to be taken seriously. I expected it to be interpreted as a /s, but apparently it was not.]
This is false for a number of reasons. After Trump’s Twitter was deleted briefly by a rogue contractor, they placed safeguards on his account to ensure that it never happened again.(1) As such, he was not affected by the hack.
(1): https://www.nytimes.com/2017/11/03/technology/trump-twitter-...