(Image of Elizabeth Warren at the Iowa State Fair Soapbox event)
A front-running presidential candidate apologizes at an event in Iowa.
Democratic Senator Elizabeth Warren made the apology Monday while speaking at a presidential forum on Native American issues in Sioux City.
Warren had drawn criticism over her decision last year to release the results of a DNA test that showed distant Native American ancestry.
She's made numerous public and private apologies since them.
An average of Iowa polls shows Warren trailing only former Vice President Joe Biden for the Democratic nomination.