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 to get them out. There's a group of folks in our party who would have troops in six countries right now, maybe more." That drew a rebuke from Graham, a South Carolina senator and Air Force reservist who frequently criticizes Democratic President Barack Obama for not being aggressive enough with adversaries like Iran and the Islamic State.
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