That’s entirely plausible. We know her husband has made millions in China. At some point they compromised her. She’s been aiding a communist government since. They can’t tell us for National Security reasons, but she had to be responsible for a treasure trove of intel making it’s way to China through her longtime spy/driver.
Feinstein chaired the Senate Intelligence Committee from 1/09 to 1/15 and has been Vice-Chair since.
She had some Intel at her disposal.
Some might say that POTUS’ statement about Chinese “theft of intellectual property” was an indicator/warning for DF.