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Republican presidential hopeful Wisconsin Governor Scott Walker speaks during the 2015 Southern Republican Leadership Conference May 21, 2015 in Oklahoma City, Oklahoma.
Republican presidential hopeful Wisconsin Governor Scott Walker speaks during the 2015 Southern Republican Leadership Conference May 21, 2015 in Oklahoma City, Oklahoma.

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    Scott Walker leads Iowa Poll

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Scott Walker leads Iowa Poll

John King, Sara Murray and Robert Costa weigh in on the latest Des Moines Register poll which looks at the GOP candidates for president.

Scott Walker leads Iowa Poll

John King, Sara Murray and Robert Costa weigh in on the latest Des Moines Register poll which looks at the GOP candidates for president.