Former U.N. Ambassador Nikki Haley is attracting thousands of donations from people who gave to President Joe Biden’s 2020 campaign as she tries to cobble together a coalition of anti-Trump voters. More than 5,200 donors to Biden’s 2020 campaign have backed Haley financially, including roughly 1,600 who gave more than $500,000 in January alone, according to a POLITICO analysis of Haley’s most recent fundraising report, filed Tuesday night with the Federal Election Commission. That report lists donors who give at least $200 total, and Haley’s campaign reported raising money from more than 55,000 such “large-dollar” donors in the month of...