Questions about tax issues have now clouded three nominations. (PHOTO CREDIT: JIM WATSON/AFP/GETTY IMAGES) From CNN's Jack Cafferty: President Obama says he "screwed up” when it came to the nomination of Tom Daschle as Health and Human Services Secretary. No kidding. Daschle dropped out after days of questioning about more than $100,000 in unpaid taxes. … Continue reading Pres. Obama’s credibility hurt by tax scandals?