If it's a poll of registered voters, then Ernst is probably leading IRL. Great news for the GOP.
Braley needs to go negative with ads listing all the crazy ish Ernst has done and said.
People who live in glass houses shouldn't throw stones. Braley has said and done some crazy-ish things of his own, so Ernst could easily counter-attack on that front.
Yes, Braley isn't exactly in a good position to attack Ernst as a crazy gaffer.
I'm not quite sure a comment about having a farmer on the judiciary committee and some neighbor's chicken running around your yard is on the same level as saying that Iraq had WMDs 10 years after it's been proven they don't and calling for the impeachment of the President. But that's none of my business...