U.S. Rep. Michele Bachmann, Minnesota Republican, speaks at a rally by home-school backers in Des Moines, Iowa. More than 1,000 advocates were cheered on by her and two other potential GOP presidential candidates who joined their cause. (Associated Press)

U.S. Rep. Michele Bachmann, Minnesota Republican, speaks at a rally by home-school backers in Des Moines, Iowa. More than 1,000 advocates were cheered on by her and two other potential GOP presidential candidates who joined their cause. (Associated Press)