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Four senators balance impeachment with 2020 bids as Iowa caucus nears

For the four Democratic senators running for president, the spring back to the campaign trail will happen the second the impeachment trial gavels out today. They head to Iowa with just nine days left until the state’s caucus. Ed O’Keefe shares how Senators Warren, Sanders, Klobuchar, and Bennet are juggling their day jobs with their ambitions.
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