Complex sentence: Lenroot's 1920 re,-election was the most competitive race for a Republican senator in the nation; he received 41.6% of the voteas and was helped by a splut from strong independent, Democratic, and Socialist candidates.
Split into simpler sentences: Lenroot's 1920 re-election was the most competitive race for a Republican senator in the nation. He managed to win with 41.6% of the voteas and was helped by a split in the strong independent, Democratic, and Socialist candidates.