"It's an easy question for a journalist to ask. It's a dumb question for a journalist to ask," he said. "Marco was right, and Jeb Bush was right."
Rand Paul eager to question Hillary Clinton on Iraq, Libya →
"When you ask the question, 'knowing what we know now,' nobody knows what you mean," Mr. Sununu said on Fox News, defending the tortured answers to those questions by Mr. Rubio and Mr. Bush.