It's the fact that she's even talking about something that happened 10 years ago that makes her a bad candidate, especially something that was a failure.
You make it sound like Ernst is going around Iowa talking about WMDs in Iraq daily. She misspoke once in front of an editorial meeting. Where she was probably asked about it. She then clarified her remarks. And has moved on. Unlike the left-wing blogosphere.
Which has been picked up by nothing but the left-wing blogosphere. And she admits she misspoke and has moved on, unlike the left-wing blogosphere.
Which is something nobody has heard of. Can there be a gaffe about things people don't care about?
Meanwhille, your candidate insulted the state's sitting Senator and farmers and threatened to sue because the chickens she was using as theraputic animals for disabled kids were on his lawn. He has trouble connecting with ordinary Iowans and is throwing away what should be an easy win in November.