Senate Majority Leader John Thune (R-SD) believes that Republicans are at risk of losing their control of the upper chamber this fall, despite having a group of “high-quality candidates.”“I worry about that, for sure,” Thune said in a Tuesday interview with South Dakota outlet Keloland News. “I’m a realist, and I just think you — I don’t ever try and sugarcoat things. I think it’s a competitive environment right now.”

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