Carly Fiorina (R) made herself an official Senate candidate Monday by filing the required paperwork with the Santa Clara County Registrar of Voters. 

She took an opening jab at incumbent Sen. Barbara Boxer (D-Calif).

"For 18 long years, California has been represented by a bitterly partisan and ineffective senator in Barbara Boxer," the former Hewlett-Packard CEO said in a statement. "She has completely failed to represent the people who sent her to Washington in the first place. I don't come from Washington; I come from the real world. From that real-world experience I know firsthand how to create jobs, and I have been on the receiving end of job-killing government regulation."

Fiorina faces Assemblyman Chuck DeVore and former Rep. Tom Campbell in the GOP primary.

Also on Monday, Fiorina was criticized by a member of the Packard family for her stewardship of the technology company. In a letter "obtained" by, Arianna Packard called Fiorina's tenure a "disaster."

"The stock price dropped by 50% only to rally 10% on the announcement of her firing," wrote Arianna Packard, whose grandfather David Packard co-founded the company. "She fired 28,000 people before she herself was fired, departing with the 21 million dollar golden parachute that is financing her campaign."

Packard, who's supporting DeVore, sent the letter to Republican Sens. James Inhofe (Okla.), Tom Coburn (Okla.) and John Kyl (Ariz.).

Fiorina's campaign called Arianna Packard's critique "baseless."

"Carly welcomes an examination of her record," said Julie Soderlund, a Fiorina spokeswoman. "It is a record that will stand the test of scrutiny, particularly against Barbara Boxer's record of failure for the last 18 years in the Senate."

Updated at 7:05 p.m.