Charles Booker became the Democratic nominee for U.S. Senate in Kentucky on Tuesday, setting up his long-shot challenge to Sen. Rand Paul in November. The 37-year-old former single-term state legislator from Louisville easily dispensed with a slate of marginal challengers after narrowly falling to Amy McGrath in the 2020 Senate primary. “It’s official,” Booker tweeted Tuesday night. “I am the Democratic nominee for U.S. Senate in Kentucky. In November, we will make history by defeating Rand Paul and expanding our Senate majority”