Like many other brick-and-mortar retailers, Wal-Mart is trying to attract shoppers increasingly accustomed to online shopping. In one experiment, it's offering same-day delivery in four select markets. Paul Sakuma/AP hide caption

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Austin Mitchell walks away from an oil derrick outside Williston, N.D., in July 2011. North Dakota is now the No. 2 producer of oil in the U.S. behind Texas. Gregory Bull/AP hide caption

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Rep. Roscoe Bartlett, R-Md., at a House Small Business Committee hearing on Sept. 21, 2011. After two decades in Congress, a redrawn district has put his re-election in question. T.J. Kirkpatrick/The Washington Times /Landov hide caption

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