Mike Lee is a constitutional conservative and libertarian-leaning Republican who has established himself as one of the Senate's most vocal advocates for limited government and strict constitutional interpretation. A former Supreme Court clerk and federal prosecutor, he gained national attention for his willingness to challenge both Democratic and Republican leadership when he believes federal overreach is at stake. Lee has been a prominent critic of expansive government spending and regulatory power, often invoking founding principles in his opposition to what he sees as unconstitutional federal programs. His scholarly approach to constitutional law and his frequent breaks with GOP establishment positions have made him a leading voice in the party's constitutional conservative wing.