(ROUGH CUT ONLY - NO REPORTER NARRATION)<br/> <br />Voters began heading to the polls early on Tuesday morning in Struthers, Ohio, a struggling town near the eastern city of Youngstown, where the economy is a key campaign issue.<br/> <br />Ohio is the largest battleground and most closely watched prize of the 10 contests on Super Tuesday.<br/> <br />Other state contests include Virginia, Massachusetts, Tennessee, Georgia, Alaska, Idaho, North Dakota, Oklahoma, and Vermont.<br/> <br />Super Tuesday is the biggest day so far in the Republican race to find a challenger to President Barack Obama in the November 6 election. At stake are 419 of the 1,144 delegates needed to win the party's nomination.
