File photo of Republican U.S. Congressman Tancredo in Des Moines, Iowa

 
File photo of Republican U.S. Congressman Tancredo in Des Moines, Iowa
Then Republican presidential candidate U.S. Congressman Tom Tancredo (R-CO) introduces a new television campaign advertisement on illegal immigration to the press at the Marriot Hotel in Des Moines, Iowa in this November 12, 2007 file photo. REUTERS/Shannon Stapleton/Files