Complex sentence: A prime example of the negative side YouTube has on politics occurred in August of 2006 when the Virginia Republican, Senator George Allen was caught on tape calling a college student of Indian descent a racial slur.
Split into simpler sentences: A prime example that highlights the negative side YouTube has on politics is an incident involving Senator George Allen. In August of 2006, the Virginia Republican was caught on tape calling a college student of Indian descent a racial slur.