I really doubt that it was done by a US government entity. Trump is the president and all, but to hack and release (by a third party) the personal information if a citizen (not suspected or related to any crime) seems to me to be something that even Trump or his supporters can't do, the intelligence agencies just wouldn't do it in my opinion.
The Saudis seem like a much more likely party to do it in my opinion, mostly because we know they are willing to do a lot worse against people they oppose (or who oppose them).
That being said, I also think that playing the "A government hacked my phone" is a much better play on behalf of Bezos then claiming it was done by someone accessing his or Sanchezs phone (for example her brother who is supposedly a Trump supporter, like the link in the end suggests).
The Saudis seem like a much more likely party to do it in my opinion, mostly because we know they are willing to do a lot worse against people they oppose (or who oppose them).
That being said, I also think that playing the "A government hacked my phone" is a much better play on behalf of Bezos then claiming it was done by someone accessing his or Sanchezs phone (for example her brother who is supposedly a Trump supporter, like the link in the end suggests).