Rep. Ruben Gallego, a retired U.S. Marine and longtime U.S. representative in the House, is the front-runner to win Arizona's U.S. Senate seat and become the state's first Latino senator.

As Ruben Gallego prepares for the biggest ... When officials suggested he take a leave, Gallego joined the United States Marine Corps Reserve before returning to Harvard and graduating in 2004.

Ruben Gallego ... U.S. Customs and Border Protection Air and Marine Operations. “Strengthening our border includes keeping our waters secure," Gallego said in a written statement.

The bill would give US Customs and Border Protection more authority. Former Sen. Kyrsten Sinema previously introduced a version.