By shelling out another $15 million from her hi-tech fortune this week, she surpassed the $109 million spent by New York mayor Michael Bloomberg on his 2009 reelection campaign…

The mother-of-two is the fourth wealthiest woman in California with a net worth of $1.3 billion.

But despite her huge personal stake in winning, the race with Democrat rival Jerry Brown is still extremely tight with the election less than two months away.