On CNN’s State of the Union, House Intelligence Committee Chairman Rep. Mike Turner tells CNN’s Jake Tapper that he agrees Russian propaganda has "infected” a portion of the Republican base. World Food Programme Executive Director Cindy McCain warns that “children are dying as we speak” in Gaza. And, six months after the Hamas attack, an Israeli-American hostage family speaks out on efforts to bring back their son and brother. Plus, CNN’s Fareed Zakaria previews his new book “Age of Revolutions."