ShopTalk Polo Sandoval Joins CNN From KRGV By Merrill Knox on Feb. 11, 2014 - 12:12 PM Polo Sandoval is joining CNN Newsource as a national correspondent based in Washington, D.C. Sandoval comes from KRGV, the ABC affiliate in Welasco, Texas. “Polo is a versatile and talented journalist, who gets to the crux of a ...