British Prime Minister David Cameron and President Obama headed to Ohio to take in one of the “first four” games of the NCAA basketball tournament Tuesday, a lighthearted start to a state visit that will turn to more difficult subjects Wednesday. The leaders left their wives in Washington for the man date in the swing state, an outing billed by the White House as important cross-cultural bonding time. The president clearly relished the chance to show off one of his favorite events. After discussing his bracket predictions for the men’s and women’s basketball tournaments with ESPN.com, he showed Cameron to...