In this Aug. 1, 2017, photo, U.S. Vice President Mike Pence attends a welcome ceremony at Golubovci airport, near Podgorica, Montenegro. Pence has been a loyal messenger for President Donald Trump. At the same time, he has been carving out his own political identity as the steady understudy to a mercurial president. (AP Photo/Risto Bozovic, File)