California Republican Carly Fiorina may have to dip into her personal fortune to bolster her Senate campaign.

The former Hewlett-Packard CEO has pledged not to self-fund her bid to unseat Sen. Barbara Boxer (D-Calif.) but Fiorina pulled in only $1.7 million last quarter, according to a release. She currently has $2.8 million in the bank.

She narrowly out-raised her main primary opponent, Tom Campbell. The former congressman announced earlier he brought in $1.63 million last quarter.

Meanwhile, Boxer has raised $2.4 million since January -- her "strongest fundraising quarter yet," according to a release. The Democrat now has $8.7 million cash on hand, after banking $1.5 million of her first quarter haul.