The longtime Republican leader froze up during a news conference on Wednesday in Kentucky. The second such episode in recent weeks, it stirred speculation about his future in the Senate.
In Kentucky, Republicans are choosing a nominee to take on the popular Democratic governor. In Philadelphia, Democrats are knotted in a crowded primary to lead the influential liberal city.
Kentucky Republicans are fighting over a nominee to challenge the Democratic governor, with a longtime Mitch McConnell ally squaring off against a wealthy former Trump administration ambassador.