Complex sentence: Roosevelt soon became a popular figure among New York Democrats, though he had not as yet become an eloquent speaker, and news articles and cartoons began depicting "the second coming of a Roosevelt" that sent "cold shivers down the spine of Tammany".
Split into simpler sentences: Roosevelt soon became a popular figure among New York Democrats, though he had not as yet become an eloquent speaker. News articles and cartoons began depicting "the second coming of a Roosevelt" that sent "cold shivers down the spine of Tammany".