SAN ANTONIO -

Despite a close early vote, San Antonio residents ultimately approved Mayor Julian Castro's Pre-K 4 SA initiative.

The measure passed with a 53 to 46 percent vote with all precincts reporting early Wednesday morning, according to the Bexar County elections website.

Mayor Castro asked voters to approve a 1/8th of a cent sales tax increase that would fund Pre-K education for kids in San Antonio.

"The voters of San Antonio made a huge statement tonight," Castro said. "They understand that it's not just about investing in the next two years, it's about investing in the next 20 years. And we invest in the education of young people, we're investing in the entire city and economic prosperity for everyone."

The issue was met with opposition from taxpayer groups and the Tea Party.

George Rodriguez of Citizens For Responsive Government, a group opposed to the issue, said that opposition groups didn't have the kind of money mayor and supporters did.

"The biggest thing you got to remember: We are like David and Goliath. We have no money, we have very little organization, very much grass roots organization made up of common citizens. No lobbyists, no big business behind us," Rodriguez said.

The program is set to start next fall, and Castro said the initiative would benefit 22,000 children over the next eight years. The city will begin collecting the tax in April.