Paul, Graham clash on foreign-policy on U.S. campaign trail

By Andy Sullivan NASHUA, N.H. (Reuters) - Republican presidential hopefuls Rand Paul and Lindsey Graham took their debate over America's role in the world from the U.S. Senate floor to the campaign trail on Saturday in an early sign that foreign policy is likely to be a flash point in the 2016 election. At a gathering of 18 potential and actual White House contenders, Paul accused fellow Republicans of being too willing to commit U.S. troops to foreign conflicts without a clear idea of how