Donald Trump's commanding victory in Iowa underscores his enduring appeal to a wide swath of Republican voters, and his campaign's sophisticated, data-driven ground game. While Trump remains the prohibitive favorite to secure the Republican Party's presidential nomination, he needs a convincing win in New Hampshire to ensure his surviving rivals have little to no path left to outmaneuver him. Trump's win on Monday night in Iowa was broad-based, with the former president taking all but one of the state's 99 counties, including in the suburbs outside Des Moines.