PETERBOROUGH, New Hampshire — Nikki Haley ripped GOP front-runner Donald Trump Saturday for confusing her with Nancy Pelosi — and claiming she had to scold her then-boss when she served as his ambassador to the United Nations. “Guess what, when you’re 80 you’re just not as sharp as you used to be,” Haley told a crowd of about 200 voters at the Monadnock Center for History and Culture, a museum in Peterborough, N.H. She mocked Trump for his Friday night gaffe in Concord, N.H., when he referred to Haley instead of Pelosi as he discussed the Jan. 6, 2021 riot...