what does "eighteenth-century guns" and "mandate" indicate to?
The President laughed aloud. "Barry can do no wrong in Moley's eyes," he chuckled. In fact, the Barry boom was becoming the biggest joke in politics. The right-wing columnists were urging Goldwater to stick to his eighteenth-century guns, which was what Goldwater wanted to do—which was what Kennedy wanted him to do. If the Senator won the GOP nomination next summer, the President would clearly win the mandate he had missed in 1960. He read Moley again, rolled the magazine into a bat, and slapped his knee. "That's terrific!"