Former President Donald Trump defended his remarks about migrants crossing the southern border “poisoning the blood” of America on Tuesday, reinforcing the theme while dismissing any resemblance to fascist writings highlighted by others. “I never read ‘Mein Kampf,'” Trump said at a campaign rally in Waterloo, Iowa, referencing Adolf Hitler’s fascist manifesto. Illegal immigrants, according to Trump, are “destroying the blood of our country, they’re destroying the fabric of our country.” Trump responded to rising criticism about his rhetoric over the weekend, when he doubled down on anti-immigrant “blood” purity remarks in front of several thousand fans in New Hampshire,...