Speaking at an Iowans For Tax Relief event, Bachmann (R-MN) also noted how slavery was a "scourge" on American history, but added that "we also know that the very founders that wrote those documents worked tirelessly until slavery was no more in the United States."
"And," she continued, "I think it is high time that we recognize the contribution of our forbearers who worked tirelessly -- men like John Quincy Adams, who would not rest until slavery was extinguished in the country."
It's true -- Adams became a vocal opponent of slavery, especially during his time in the House of Representatives. But Adams was not one of the founders, nor did he live to see the Emancipation Proclamation signed in 1863 (he died in 1848).
Here's a portion of the speech. The above comments come in at the 9:00 minute mark: