Open this photo in gallery: Republican presidential candidate and former U.S. President Donald Trump speaks at a rally in Durham, New Hampshire, U.S., Dec. 16, 2023.BRIAN SNYDER/Reuters Donald Trump, the Republican presidential front-runner, said on Saturday that undocumented immigrants were “poisoning the blood of our country,” repeating language that has previously drawn criticism as xenophobic and echoing of Nazi rhetoric. Trump made the comments during a campaign event in New Hampshire where he railed against migrant crossings at the U.S.-Mexico border, which hit new highs in September. Trump has promised to crack down on illegal immigration and restrict legal immigration...