WATERLOO, Iowa (AP) — Former President Donald Trump on Tuesday defended his comments about migrants crossing the southern border “poisoning the blood” of America, and he reinforced the message while denying any similarities to fascist writings others had noted.“I never read ‘Mein Kampf,’” Trump said at a campaign rally in Waterloo, Iowa, referencing Adolf Hitler’s fascist manifesto.Immigrants in the U.S. illegally, Trump said Tuesday, are “destroying the blood of our country, they’re destroying the fabric of our country.”In the speech to more than 1,000 supporters from a podium flanked by Christmas trees in red MAGA hats, Trump responded to mounting criticism about his anti-immigrant “blood” purity rhetoric over the weekend. Several politicians and extremism experts have noted his languag...