Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Super Tuesday Looms as Biggest Day in Presidential Primary Calendar Jim Malone WASHINGTON - In the Democratic presidential race, all eyes are on South Carolina this week in anticipation of Saturday's primary. Former Vice President Joe Biden is counting on a victory, with help from the state's large number of African American voters, to get back in the race and stem the momentum of Vermont Sen. Bernie Sanders, the clear front-runner for the Democratic nomination. Recent polls show Sanders edging closer to Biden in the top spot after Sanders' strong showing in the first three contests in Iowa, New Hampshireand Nevada. The Democratic field is also looking ahead to next week's Super Tuesday primaries, the single most important day on the primary election calendar. .