Was this whole Native American thing stupid? Yes. What can't be denied is the work she's done in Congress. She's continually been a driving force against big businesses and banks taking advantage of the American people.
If we're going to honestly compare this gaffe versus a shitting President currently under investigation for campaign finance violations, tax evasion, fraud, conspiracy, and treason, I'll go with the person with a proven track record of doing the right thing in Congress and forgive this one problem.
If you're looking for a perfect candidate with no possible issues, you're going to be looking for a long time.