Never heard of her.
I hadn't either. A Google search turned up this from a year ago (highlighting mine): Sally Bradshaw, senior Bush confidante, leaves the GOP.
Highlight:
Sally Bradshaw made the announcement in an interview with CNN, saying that despite decades of work on behalf of GOP candidates most prominently Bush, the former Florida governor, and his father's 1988 presidential campaign she might vote for Clinton, the Democratic presidential candidate, if the race in her home state of Florida is close.
Bradshaw told CNN in an email that the GOP is "at a crossroads and have nominated a total narcissist a misogynist a bigot."
"This is a time when country has to take priority over political parties. Donald Trump cannot be elected president," Bradshaw wrote.
She was Jeb’s consigliere for 20 years. After spending $150 million on the 2016 campaign for a whopping THREE delegates, she wisely left the Republican Party.