In early January, almost everyone in the country seemed to have the flu, including U.S. House Rep. Raúl Grijalva. “My grandkids made me sick!” he exclaimed over the phone from Washington, D.C., sounding congested. Grijalva, a Democrat, represents Arizona’s 3rd District, which comprises most of the state’s southern border, including Nogales, a town of one- and two-story buildings, nestled in a valley and named for the groves of walnuts that once thrived in the surrounding hills. It’s separated from Nogales, Sonora, by the international border. The binational city is known as Ambos Nogales, or “both Nogales.” When Grijalva asked me how the weather was in Nogales, I wondered if he was homesick.