Eight influential Republican Senators jumped on board former Hewlett-Packard CEO Carly Fiorinas (R) California Senate campaign Thursday, a day after she officially launched her bid to take on Sen. Barbara Boxer (D) in 2010.Those endorsing Fiorina included Minority Leader Mitch McConnell (Ky.), Minority Whip Jon Kyl (Ariz.) and GOP Conference Vice Chairwoman Lisa Murkowski (Alaska) as well as GOP Sens. John McCain (Ariz.), Tom Coburn (Okla.), Susan Collins (Maine), Lindsey Graham (S.C.) and Olympia Snowe (Maine). All cited her experience as a business leader.In his statement, McCain praised Fiorinas service as an adviser during his 2008 presidential bid. I benefited from her no-nonsense way of getting things done when she served on my campaign last year, he said.Collins, Snowe and Murkowski represent three of the four Republican women in the Senate. The fourth is Sen. Kay Bailey Hutchison (Texas), who is running for governor next year.The endorsements are, in effect, a counterpunch to state Assemblyman Chuck DeVore, Fiorinas primary rival, who has been touting an endorsement this week from conservative Sen. Jim DeMint (R-S.C.). They also solidify the impression that Fiorina is the choice of the Republican establishment in Washington.