Among Republican presidential candidates, former U.N. ambassador and South Carolina governor Nikki Haley strikes the most fear unto Joe Biden’s campaign team, according to an insider. Driving the news: Haley, 51, is the only woman and one of three Indian Americans in the GOP’s pool of presidential hopefuls. What distinguishes her campaign, however, are policy positions that increasingly resonate with more moderate voters, particularly those actively looking for an alternative to Donald Trump. “If they nominate Nikki Haley, we’re in trouble,” a senior Democratic strategist close to the Biden campaign told Politico earlier this month. Such fears corroborate Haley’s positioning...