Los Angeles ? Gov. Arnold Schwarzenegger’s special-election campaign bought nearly $1 million in advertising time from Univision, a Spanish-language TV network whose chairman is his biggest single donor, a newspaper reported Saturday.

The campaign bought no time from rival network Telemundo, which did not donate to the campaign, according to campaign finance reports cited by the Los Angeles Times.

Univision’s A. Jerrold Perenchio has contributed $4.8 million to Schwarzenegger campaign committees since 2002, including $1.5 million on Oct. 4, according to the reports.

In the four weeks that ended Oct. 22, the governor’s campaign to support initiatives on the Nov. 8 special election ballot spent $983,487 at Univision stations.

Schwarzenegger spokesman Todd Harris said the decision to buy statewide air time from Univision and not from Telemundo had nothing to do with political contributions.

Telemundo has a smaller audience and buying from Univision “was the most cost-effective way to reach as many Spanish-speaking voters as possible,” Harris said.

“You advertise where the voters are,” he said.

A Univision spokeswoman declined to comment to the Times.