Nikki Haley looked to New Hampshire voters on Tuesday to help her block Donald Trump’s march to the Republican Party’s presidential nomination with an upset win, or at least score enough support to keep her campaign going in bigger U.S. states. The former U.S. president and Haley, a former South Carolina governor who was Trump’s ambassador to the United Nations, were in a two-person race in the New England state after Ron DeSantis, the Florida governor, dropped out and endorsed Trump.