McCain is with winning, do you really think that Republicans allowed McCain - ALONE - to choose Palin? No way.
In fact, there is a well documented account of how Palin was chosen. Indeed, the piece is written by Jane Mayer who wrote the recent piece, excellent piece on the Koch Brothers.
You should read the entire article. It clearly explains that while McCain was initially moved by Palin, once his team started to vet her, he realized that he wanted Lieberman more. It was Kristol and a gang of neocons who served as McCain's top advisors like Charlie Black who finally convinced him:
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By the spring, the McCain campaign had reportedly sent scouts to Alaska to start vetting Palin as a possible running mate. A week or so before McCain named her, however, sources close to the campaign say, McCain was intent on naming his fellow-senator Joe Lieberman, an independent, who left the Democratic Party in 2006. David Keene, the chairman of the American Conservative Union, who is close to a number of McCain’s top aides, told me that “McCain and Lindsey Graham”—the South Carolina senator, who has been McCain’s closest campaign companion—“really wanted Joe.” But Keene believed that “McCain was scared off” in the final days, after warnings from his advisers that choosing Lieberman would ignite a contentious floor fight at the Convention, as social conservatives revolted against Lieberman for being, among other things, pro-choice.
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“They took it away from him,” a longtime friend of McCain—who asked not to be identified, since the campaign has declined to discuss its selection process—said of the advisers. “He was furious. He was pissed. It wasn’t what he wanted.” Another friend disputed this, characterizing McCain’s mood as one of “understanding resignation.”<snip>
With just days to go before the Convention, the choices were slim. Karl Rove favored McCain’s former rival Mitt Romney, but enough animus lingered from the primaries that McCain rejected the pairing. “I told Romney not to wait by the phone, because ‘he doesn’t like you,’ ” Keene, who favored the choice, said. “With John McCain, all politics is personal.” Other possible choices—such as former Representative Rob Portman, of Ohio, or Governor Tim Pawlenty, of Minnesota—seemed too conventional. They did not transmit McCain’s core message that he was a “maverick.” Finally, McCain’s top aides, including Steve Schmidt and Rick Davis, converged on Palin. Ed Rogers, the chairman of B.G.R., a well-connected, largely Republican lobbying firm, said, “Her criteria kept popping out. She was a governor—that’s good. The shorter the Washington résumé the better. A female is better still. And then there was her story.” He admitted, “There was concern that she was a novice.” In addition to Schmidt and Davis, Charles R. Black, Jr., the lobbyist and political operative who is McCain’s chief campaign adviser, reportedly favored Palin. Keene said, “I’m told that Charlie Black told McCain, ‘If you pick anyone else, you’re going to lose. But if you pick Palin you may win.’ ” (Black did not return calls for comment.) Meanwhile, McCain’s longtime friend said, “Kristol was out there shaking the pom-poms.”
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McCain had met Palin once, but their conversation—at a reception during a meeting of the National Governors Association, six months earlier—had lasted only fifteen minutes. “It wasn’t a real conversation,” said the longtime friend, who called the choice of Palin “the fucking most ridiculous thing I’ve ever heard.” Aides arranged a phone call between McCain and Palin, and scrutinized her answers to some seventy items on a questionnaire that she had filled out. But McCain didn’t talk with Palin in person again until the morning of Thursday, August 28th. Palin was flown down to his retreat in Sedona, Arizona, and they spoke for an hour or two. By the time he announced her as his choice, the next day, he had spent less than three hours in her company.
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Read more
http://www.newyorker.com/reporting/2008/10/27/081027fa_fact_mayer?currentPage=all#ixzz0xfTwhPGI