By Justin Wingerter Staff Writer jwingerter@oklahoman.comTulsa attorney John O'Connor, whose nomination to be a federal judge was postponed by a Senate committee Friday, was twice investigated by the Oklahoma Bar Association, was sued for allegedly engaging in shady billing practices and was found unanimously to be unqualified by 15 attorneys on a national committee. Emails and letters between the American Bar Association and Senate Judiciary Committee show the ABA twice reviewed O'Connor's history and talked with more than 50 people who know O'Connor before taking the unusual step of rating him unanimously unqualified for the federal judgeship President Donald Trump nominated him to earlier this year. Those documents paint the picture of an attorney with a lengthy but undistinguished career and very limited experience in jury trials, federal court proceedings or criminal law. They suggest O'Connor was hired by Oklahoma Insurance Commissioner John Doak, whom he had hosted political fundraisers for, despite a lack of experience with insurance law.Read more on NewsOK.com