His name is Russell Lowe and he was her San Francisco Office Manager, not just a ‘driver’. What is admitted is that the FBI told her five or so years ago that Lowe was being recruited by Chinese intelligence services. Lowe then left her employ. No one will confirm actual espionage.
Contrast that story when it was alleged that Trump campaign workers were being recruited by Russian intelligence. No one told the campaign and FISA warrants were issued to spy on the whole campaign.
Thank you!