Which of the following is a current U.S. Senator from Kentucky?

The correct choice identifies Rand Paul as a current U.S. Senator from Kentucky. He has served in this role since 2011, representing Kentucky in the Senate. Senators are elected to represent their states in the federal legislative branch, and each state has two senators.

The other individuals listed have roles in the Senate but do not represent Kentucky. Chuck Schumer is the Senate Majority Leader and represents New York. Marco Rubio represents Florida, and Bernie Sanders, while often associated with independent political views, represents Vermont. This understanding of who represents which state in the Senate is essential for recognizing the structure of U.S. government and the representation of individual states in Congress.