The proposal to restrict school districts' financial reserves seemed to come out of nowhere, slipped into the state budget just days before the spending plan would come up for a vote.
At a legislative hearing, Democrats were confused and Republicans were critical. Recession-weary education officials launched an unsuccessful counterattack against the measure, pushed by California's largest teachers union and inserted by Gov. Jerry Brown.
The June episode was a reminder that unions have often found a loyal friend in Brown, who has been allied with the labor movement since his political career began more than four decades ago.
The governor has occasionally frustrated union leaders with budget cuts and intransigence at the negotiating table. But he has also delivered on many of their biggest priorities, prompting his Republican opponent, Neel Kashkari, to paint him as a tool of labor benefactors.
As Brown seeks a fourth term, unions remain a key element of his political power, providing millions of dollars in donations and deep ranks of campaign foot soldiers.
"We agree on a lot of the issues," said Dean Vogel, president of the California Teachers Assn. "It's not a big surprise we would be on the same page."
Brown, for his part, "is doing what's best for California," said his spokesman, Evan Westrup.
Since Brown took office in 2011, labor has chalked up victories large and small.
A union representing cashiers successfully pushed limits on self-serve computers at grocery store checkouts. Unionized state employees received raises of 1.5 percent to 6 percent after several lean years.
Infrastructure projects Brown is championing, such as new reservoirs and a bullet train, are expected to create thousands of union jobs.
The California Teachers Association, a political powerhouse in Sacramento and one of the governor's biggest financial backers, has scored several wins.
The new rule limiting school reserves, which will take effect if voters next month approve Proposition 2, the governor and Legislature's bid to strengthen the state's rainy-day fund, could free up more money for wages and classroom spending.
Brown agreed to a moratorium on teacher layoffs during the state's budget crisis three years ago. And this year he appealed a controversial court decision that struck down some tenure rules.
Brown has helped other workers too. He signed legislation boosting the minimum wage to $10 an hour over the next two years, requiring that many domestic workers qualify for overtime pay and guaranteeing paid sick days for millions.
The governor acknowledged his affinity for labor in a March speech to the California Labor Federation, a coalition representing 2.1 million workers. He traced the connection to his childhood, when his father, Pat Brown, was a San Francisco prosecutor.
"I remember from the first time he ran for district attorney, he had the San Francisco building trades right there in the living room," Brown said. "I know how important labor has been."
He told union members they won't always see eye to eye, but they should be patient: "If you don't get the bill signed the first year ... I'll be around for the next five years."
Indeed, Brown is considered a shoo-in for reelection. He leads Kashkari, a former U.S. Treasury official, by as much as 20 points in multiple polls.
Unions have contributed about $3 million to the governor's $23.6 million re-election account and nearly $2 million to his campaign fund for the water bond and rainy-day reserve. They have also contributed to organizations such as the state Democratic Party that have given to Brown and his causes.
When Brown ran for governor in 2010, unions helped him counter a record-breaking $160 million campaign by GOP rival Meg Whitman, former eBay chief.
Rob Stutzman, a Republican consultant who worked for Whitman, said money spent separately from Brown's campaign helped keep him from losing ground early in the race, when he was still building his war chest. Unions were part of the independent effort, spending $14 million on it before the summer was over.
"Their support was critical," Stutzman said. "He never really fell behind."
In 2012, Brown relied on unions to help pass Proposition 30, his temporary tax-hike measure. The Service Employees International Union, which represents health care workers, government employees and others, pitched in $4.3 million for the campaign, and the teachers union gave $10.3 million.
Their support went beyond money. The California Labor Federation used its sophisticated campaign operation to turn out voters in support of the tax hike.
"There's nothing that substitutes for knocking on doors," said Nelson Lichtenstein, a professor of history at UC Santa Barbara. "Unions can do that. And there's not a lot of other groups that can do that."
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