U.S. Sen. Ted Cruz takes questions after The Family Leader's Presidential Family Forum on Nov. 20, 2015, in Des Moines, Iowa. (Photo by Patrick Svitek) DES MOINES — Ted Cruz's Iowa moment has arrived.The U.S. senator from Texas, who has worked for months to manage expectations in the first early voting state, is starting to flirt with top-tier status as his campaign zeroes in on this critical presidential proving ground.He has visited the state five times over the last six weeks. His paid staff in Iowa has quadrupled from what it was just two months ago. His campaign has...