Senator Thad Cochran of Mississippi, who has known Senator John McCain for more than three decades, on Wednesday endorsed Mitt Romney for president.
Cochran said his choice was prompted partly by his fear of how McCain might behave in the Oval Office.
“The thought of his being president sends a cold chill down my spine,” Cochran said about McCain by phone. “He is erratic. He is hotheaded. He loses his temper and he worries me.”