MAYOR MICHAEL R. BLOOMBERG of New York insisted yet again last week that he did not intend to run for president in 2008, even as he left the Republican Party to become an independent. Then, on Friday, he tweaked his language somewhat, simply saying, “I’m not going to be president.”

Which opens the door to a Swiftian modest proposal, one that might appeal to any billionaire independent presidential candidate who knows the art of a deal: Rather than try to win the White House outright — a long shot — an independent candidate could instead try for a king-making (or queen-making) bloc of votes in the Electoral College.

In doing so, a moneyed candidate like Mr. Bloomberg could advance his post-partisan national agenda — and gain a great deal of power — by introducing coalition politics to America’s system of government, through a power-sharing plan that catapults either the Republican or Democratic nominee to the presidency. Here’s how it might work:

With the nation divided into red and blue as it has been in the last two presidential elections, all a rich, self-financed candidate would have to do is win a big state (or two) to ensure having a king-making bloc of electoral votes: say, Florida (the decisive state in 2000), or Ohio (2004), or maybe New York (Mr. Bloomberg’s home state), or California (that of his friend, Gov. Arnold Schwarzenegger).

Mr. Bloomberg spent $84 million in 2005 to win re-election as mayor. In 2008, a wealthy candidate could spend five times that (or 10 times, as some Bloomberg associates suggest he might do) to run for president. Under this hypothetical scenario, the money would support a targeted advertising campaign to sell an Electoral College strategy to voters. (You wouldn’t even need to get on the ballot throughout the country.)