If a red-state firewall is going to save the Republican Senate majority, the polls aren’t showing it yet, just four days out from Tuesday’s midterm elections.

The RealClearPolitics polling averages showed Democrats leading in six of eight toss-up Senate races as of Thursday night. The Republicans lead by 2.7 percentage points in South Carolina, which wasn’t considered especially competitive until a New York Times-Siena College poll this week showed Sen. Darline Graham (R-SC) tied with her Democratic challenger.

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