Washington Post: The Environmental Protection Agency yesterday denied a request by Texas to temporarily cut federal ethanol requirements for the nation’s fuel supply, saying the state had not proved that the recent rise in corn prices is severely hurting its economy. Under the energy law signed late last year, 9 billion gallons of ethanol and biodiesel must be blended into gasoline between Sept. 1, 2008, and Aug. 31, 2009, to meet a national Renewable Fuels Standard. Texas Gov. Rick Perry (R) sought …