Across from the U.S. Supreme Court building, up a labyrinth of stairs and hallways, behind a plain, wooden desk, sits cherubic Ruben Gallego. Graying beard. Electric-blue eyes. Standing “just slightly above” 5-foot-7, he tells me.
The junior senator from Arizona came up in politics as a progressive darling, but lately, Gallego reads as something else entirely. Not a centrist, exactly. He’s a…