Democratic Representative Ruben Gallego of Arizona has announced his campaign for the United States Senate, setting up a potential 2024 clash with incumbent Senator Kyrsten Sinema. Gallego is a Marine Corps veteran who served in Iraq and has been a member of the House since 2015. He has asked for the support of his fellow veterans in his campaign and has hired well-known Democratic consultants and pollsters. The outcome of this potential three-way contest between Gallego, Sinema, and any other potential candidates will be closely watched by major Democratic leaders.