In the summer of 2014, I joined a group of journalists in an organized visit to a Border Patrol warehouse in Nogales, Arizona. My daughter had just turned 5 the day before. As I walked out the door, I remember using my hands to smooth out the wrinkles on her school uniform as tenderly as if I were waking her up from sleep. I remember writing my daily note to her in our shared language-Eu te amo-with an extra dose of guilt; leaving her in her father's care was always safe and convenient, but never easy.