Republicans have a message for the businesses that worked closely with the Obama administration over the past two years on key controversial issues: We won't forget.

Take the case of Wal-Mart, the behemoth big-box retailer that liberals have long loved to hate. Several years ago, it began to break ranks with industry groups by speaking out in favor of an increase to the minimum wage and health-care reform. And, for the first time in its history, it gave more money to Democrats than the GOP for Tuesday's elections.

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