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Shifting Battlegrounds

Some new polls out over the past couple of days yield some interesting results in some key battleground states. In Ohio, a new Suffolk University poll shows John McCain with a slim lead in the all-important Buckeye State. Among likely voters, McCain led 46 percent to 42 percent in the poll.

Meanwhile, a new Des Moines Register poll shows Obama with a commanding 52 percent to 40 percent lead in Iowa, where Obama's march to the nomination began. And in Minnesota, a Minneapolis Star Tribune poll has the race tied at 45 percent each. A Star Tribune poll last May showed Obama with a 13-point lead.

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