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During her 42-hour attempted swim from Cuba to Key West this week, Diana Nyad battled extreme exhaustion, severe sunburn, strained muscles, powerful storms and circling sharks. But the thing that really ground the 103-mile trek to a halt, she said,…

Are you excited yet? We are! In a special edition of this week's Political Checklist, I talked with senior correspondent Gwen Ifill and UStream Vice President Craig Mullaney about our partnership for the Republican National Convention beginning Monday.