The Tea Party is almost solely grassroots-based; business interests have almost no grassroots organization. The Republican Party has for too long been run on behalf of business interests who favor candidates the grassroots hate; the minute that those candidates begin to flag, only loyal Tea Partiers stand behind them.
President Obama's biggest advocates believe that Americans are ready to embrace his vision for the United States: a less muscular America on the world stage, an America with a more controlling executive branch and less conflict in the legislative branch, an America in which the government takes care of us, be we Pajama Boys or Julias.
Geopolitical drama lessened but did not die after the Cold War; in 2008, the specter of thousands of seeming automatons banging drums at the opening of the Beijing Games frightened and enthralled the world, reminding us that China was a nation on the rise, a competitor for global dominance.