Staunch supporters of President-elect Donald Trump expressed their concerns that Sen. John Thune (R-SD) is likely to follow Minority Leader Mitch McConnell's (R-KY) example and not toe the MAGA line.

Republican Sen. John Thune of South Dakota was elected Senate majority leader on Wednesday after the GOP won control of the Senate last week. Thune will replace GOP Sen. Mitch McConnell of Kentucky, who is stepping down from party leadership after serving an 18-year tenure,