Audible gasps, shock, outrage and support for a congressional investigation were the responses by law-enforcement officers, elected officials and attorneys to a presentation by Sheriff Joe Arpaio’s Cold Case Posse of evidence that Barack Obama’s birth certificate is fraudulent. Arpaio’s lead investigator, Mike Zullo, made a public presentation Saturday at the annual convention of the Constitutional Sheriffs and Peace Officers Association in St. Charles, Mo., then held a closed-door session for police officers, elected officials and others. “Sheriff Arpaio wants this in Congress. That’s where we intend to take it,” Zullo said in an interview with Carl Gallups of PPSimmons...