Artur Davis weigh on Biden's "chains" comment, Rep. Paul Ryan (R-Wis.) will talk about Medicare in Ohio, and Rep. Cliff Stearns (R-Fla.) concedes.

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* In an interview on CNN, former congressman Artur Davis, a Democrat-turned-Republican, fanned the flames the aftermath of Vice President Biden's Tuesday remark in Virginia that Mitt Romney's approach to financial regulation will "put ya'll back in chains." Davis, who is African-American, said, "Every black person in that room knew who the 'ya'll' were, knows what the 'chains' were."

* For the first time on President Obama's three-day bus tour of Iowa, First Lady Michelle Obama joined him on the stump and talked at a rally about her fond memories of visiting the state in 2008.

* A four-day Gallup tracking poll conducted immediately after Romney announced Rep. Paul Ryan (R-Wis.) as his running mate shows the selection had virtually no impact on Romney's standing against Obama. A 46 percent to 45 percent Romney lead became a 47 percent to 45 percent lead. However, Romney could experience a delayed bounce as he polled better from Aug. 13-14 than he did from Aug. 11-12.

* Rep. Cliff Stearns (R-Fla.) officially conceded to veterinarian Ted Yoho, who defeated the 12-term congressman by just one percentage point on Tuesday. Stearns is the 12th House incumbent to go down in primary this year.

* A new GOP poll of New York's 27th District race shows Rep. Kathy Hochul (D) trailing Republican challenger Chris Collins 47 percent to 34 percent. The poll was conducted for the GOP-aligned American Action Network by National Research Inc.


* According to an aide, Ryan is expected to address Medicare "at greater length" in his remarks in Ohio this evening.

* A new automated Purple Poll of Florida, Colorado, Virginia, and Ohio shows a small bounce for Romney following the Ryan pick. Notably Ryan's net favorablity is higher than Vice President Biden's in all four states.

* The conservative 60 Plus Association released new TV ads targeting Sens. Bill Nelson (D-Fla.) and Sherrod Brown (D-Ohio) over their support for the federal health care law. The group is spending $232,000 on the ad buy in Ohio and $276,000 on the one in Florida.

* A Pennsylvania judge ruled that a GOP-backed voter ID law could be implemented on Election Day in the state. Opponents are expected to appeal the decision.

* Former Secretary of State Condoleezza Rice is showing off her Cleveland Browns pride by donning on a Joshua Cribbs jersey for a new campaign designed to encourage women to support their favorite NFL teams.


Crane lower that rover.

With Aaron Blake and Rachel Weiner