Fiorina had 55 percent of the vote with 10 percent of precincts reporting, AP said. She defeated former U.S. Representative Tom Campbell and former state Assemblyman Chuck Devore, a favorite of Tea Party activists.
Fiorina, 55, spent more than $6.7 million on her primary campaign as of May 19, according to the Center for Responsive Politics, three times more than Campbell or Devore. The former company executive overcame voter anger toward Wall Street to earn a spot on the November ballot.
In the days before the primary, Fiorina turned her attention to the general election campaign against Boxer. She released a television advertisement that attacked Boxer, chairwoman of the Senate Environment and Public Works Committee, for calling climate change “one of the very important national security issues we face.” Boxer’s campaign responded by assailing Hewlett-Packard’s business practices under Fiorina.