WASHINGTON, July 12 -- Sen. Charles E. Grassley, R-Iowa, issued the following news release: * * * Grassley Report Concludes Secret Service Failure to Share Threat Information Allowed for Preventable Tragedy in Butler, Identifies Path Forward for Agency Improvements * BUTLER COUNTY, IOWA - U.S. Sen. Chuck Grassley (R-Iowa), Chairman of the Senate Judiciary Committee, today released a Government Accountability Office (GAO) report compiled at his request in the wake of the attempted assassinati  more