U.S. President Barack Obama signs the Tax Delinquency Memorandum at the White House in Washington January 20, 2010. From left, Vice President Joe Biden, Obama, Missouri Congresswoman Claire McCaskill and New York Congressman Ed Towns. Obama ordered federal agencies on Wednesday to take measures to prevent companies that are delinquent in paying taxes from obtaining new government contracts. REUTERS/Kevin Lamarque (UNITED STATES - Tags: POLITICS BUSINESS)