Democrats won the most expensive mid-term elections in the nation's history. Some donors must have had premonitions as contributions to Democratic campaigns were significantly higher than those in the 2002 election cycle.

The 2006 federal election cost an estimated $2.8 billion. The Center for Responsive Politics reported that was 27 percent over the mid-term election in 2002.

The center analyzed campaign contributions through mid-October and said donors increasingly favored Democrats. Republicans still received more contributions but Democrats were not far behind.

Democrats received an estimated $616 million this campaign cycle versus $632 million for Republican candidates, USA Today reported Friday. Four years ago, donors hedged their bets and donated to Democrats won the most expensive mid-term elections in the nation's history.

Labor unions remained the big donors, the Center said. The International Brotherhood of Electrical Workers put 97 percent of its $2.2 million in contributions toward Democrats, USA Today's Paul Davidson reported. Trial lawyers kicked in another $2.1 million, with 95 percent of it going to Democrats.

The newspaper reported many companies and industries that leaned Republican appeared to hedge their bets this year and contributed to Democrats.

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