Meg Whitman, the billionaire Republican candidate for California governor just put another $15 million of her own money into the race — enshrining her in the history books as the largest self-funding political candidate ever.

Whitman, the former eBay CEO, made the $15 million donation to her 2010 California gubernatorial effort late Tuesday, putting her total personal donation to her campaign at a record-breaking $119 million.

Whitman’s 18-month campaign spending now bests New York Mayor Michael Bloomberg, the previous record-holder; he spent $110 million of his own dough to become NYC’s top exec.

To date, Whitman remains in virtual dead heat with Democratic gubernatorial candidate Jerry Brown, the former two-term governor and state Attorney General, who just launched his first-ever TV ad this month, and has spent just over $1 million to date, according to the latest finance reports.

With 48 days to go until the election, and the most intense part of the campaign to come, the question now is: how much more will Whitman spend on one of the nation’s most high-profile political races?