Paris attacks may reshape U.S. presidential race

By James Oliphant and John Whitesides WASHINGTON/DES MOINES, Iowa (Reuters) - The lethal attacks in Paris have the potential to reshape the U.S. presidential race, placing a new emphasis on issues of national security, border control, and counterterrorism, while perhaps bolstering candidates who talk toughest about taking on Islamic State militants both at home and abroad. National security has not assumed a central place in a U.S. presidential election for more than a decade as issues concernin