Joaquin Castro is a progressive Democrat who has emerged as one of the most vocal critics of former President Trump, serving on the House Intelligence Committee during both Trump impeachment proceedings and gaining national attention for his pointed questioning during hearings. The Harvard-educated lawyer and former Texas state legislator has built his congressional career around immigration reform, civil rights, and foreign policy, often drawing on his Mexican-American heritage and San Antonio roots to advocate for Latino communities. Castro has also distinguished himself as a sharp voice on national security issues, particularly regarding election interference and democratic institutions. He is the identical twin brother of former presidential candidate and HUD Secretary Julián Castro, making them one of the most prominent political families in Texas Democratic politics.