Michele Bachmann stands by slavery comment

Michele Bachmann got into another history-related tussle on ABC's "Good Morning America" today, standing by a statement she made praising the founding fathers for having "worked tirelessly to end slavery."

ABC's George Stephanopoulos asked Bachmann to defend that comment, given the fact that the U.S. founders helped enshrine slavery in the Constitution and allowed it to continue as an institution until the Civil War.