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Democrats in heated Senate battles are maintaining, according to new polls. Kentucky candidate Alison Lundergan Grimes is leading Mitch McConnell by a point in the latest Bluegrass Poll; Jeanne Shaheen is leading Scott Brown in N.H.; Kay Hagan is beating Thom Tillis in N.C. and Greg Orman and Pat Roberts are deadlocked in Kansas. TPM's Josh Marshall joins the conversation.Oct.21.2014