Liberal activist Norman Lear told me last week that if George W. Bush wins re-election, "watch what happens to real estate in New Zealand." He wasn't joking. Mr. Lear may have an exaggerated notion of the number of Americans with means to relocate to the other side of the globe. But he accurately reflects the intense feelings of a few who do: himself, financier George Soros, insurance executive Peter Lewis and Hollywood mogul Stephen Bing. Together, they have spent more than $50 million to register new voters and defeat President Bush. They are the X factor in this year's election:...