Although Cindy McCain’s business connections have benefited John McCain politically, they appear to have had little impact on his personal fortunes.

McCain is routinely ranked among the richest senators. But a prenuptial agreement has kept most assets in his wife’s name. That arrangement served as a defense for McCain when the Senate ethics committee scrutinized a real estate deal involving his wife, her father and disgraced savings and loan owner Charles Keating Jr. McCain said at the time the separation of assets helped prove the deal didn’t benefit him.

McCain himself reports little more wealth than when he started in politics. With his book royalties and radio-appearance fees donated to charity, McCain’s Senate salary of $169,300 and Navy pension of about $56,000 are his only significant sources of income. He has accounts at two banks with his wife worth up to $15,000 each, according to his most recent financial disclosure report.

In contrast, Cindy McCain is a millionaire many times over — though the McCains haven’t disclosed just how many times.

In government records, McCain is permitted to describe his wife’s salary at Hensley as simply “more than $1,000” and, when listing her major assets, say only that they are worth “more than $1 million.”

The reports show Cindy McCain has at least $9 million in assets on her own and at least $15 million with the McCain children. But those figures are virtually meaningless; her stake in Hensley & Co. alone almost certainly exceeds them by tens of millions of dollars.

Beverage industry analysts estimate Hensley’s value at more than $250 million and its annual sales at $300 million or more. Hensley describes itself as the third-largest Anheuser-Bush wholesaler in the United States. It sold more than 23 million cases of beer last year and is among the nation’s biggest beer distributors regardless of brand.

Still, don’t expect Budweiser to be the beverage of choice at the White House if McCain is elected. “Senator McCain very rarely, if ever, drinks alcohol,” campaign spokeswoman Jill Hazelbaker said.

Hensley is a prominent presence in Phoenix. Its sports sponsorships include the Phoenix International Raceway, and its foundation gives tens of thousands of dollars to local causes each year. McCain turns over most of his book and speaking proceeds to Hensley’s foundation, which distributes them to charities. Hensley’s philanthropy includes supporting a flatbed-truck service that transports intoxicated drivers and their vehicles.

Cindy McCain is Hensley’s chairwoman and holds at least a 20 percent stake in it, according to Arizona corporate records. She works mostly on strategic planning and corporate vision, said Hensley spokesman Douglas Yonko. The company is family owned, but Hensley won’t say whether Cindy McCain is a majority shareholder.

Within the industry, as heiress to her father, she is widely assumed to own a majority of the company. If so, that would make her net worth at least $100 million, if industry estimates of Hensley’s value are accurate.

Hensley distributes only Anheuser-Busch products, which makes it and the St. Louis-based brewer heavily dependent on each other, said Joe Thompson, president of the Independent Beverage Group, a research and consulting firm.

“It is a very, very competitive business, and Phoenix is a very, very competitive market,” Thompson said. Nationally, some Anheuser-Busch wholesalers are looking to end exclusive arrangements with the brewer, but Thompson does not believe Hensley is among them: “They’ve been very loyal to Anheuser-Busch, and Anheuser-Busch has been very loyal to them.”

Hensley’s Web site includes links to Anheuser-Busch promotions and to the National Beer Wholesalers Association, a powerful trade group. Hensley’s spokesman, Yonko, is the lobby’s Arizona director, and Hensley executives gave enough to the group’s political action committee to make its company honor roll.

The PAC doles out millions of dollars to Democratic and Republican congressional candidates each election. John McCain’s campaigns have received at least $26,000 from it over the years. An informal poll on the trade group’s Web site asks visitors which presidential candidate they would most like to have a beer with (Democrat Barack Obama was way ahead in late March with 45 percent, McCain was second, with 23 percent).