WASHINGTON, D.C. -- The Government Accounting Office has agreed to "review" the security procedures and taxpayer-funded travel costs of President Trump's frequent visits to his Mar-a-Lago resort in response to a request by U.S. Sens. Sheldon Whitehouse of Rhode Island and Elizabeth Warren of Massachusetts.Last month, Whitehouse and Warren were among the members of Congress raising concerns after a reported incident in which "the President [and] his staff ...