text:  Trump has chosen author and U.S. Senator J.D. Vance of Ohio as his running mate. Vance is something of an unlikely choice in that he previously was highly critical of Trump, once calling him reprehensible and privately comparing him to Adolf Hitler. Trump and his campaign meanwhile are retooling the messaging for the Republican National Convention, as NPR's Franco Ordonez reports. Former President Trump had planned a much tougher speech against President Biden, but is retooling it to focus more on unity.