Since the sibling posts are mostly right wing, and I only mentioned Hillary Clinton, here is a more bipartisan example:
https://en.m.wikipedia.org/wiki/Jared_Cohen
The CEO of Jigsaw (formerly Google Ideas) advised both Condoleezza Rice and Hillary Clinton.
https://wikileaks.org/google-is-not-what-it-seems/
There are many allegations in there, but the most salacious one is that Schmidt’s girlfriend was illegally working for Hillary on State dept matters. (I believe they made audio recordings of the phone calls that prove this, but can’t find the shorter write up anywhere).