Rep. Darrell Issa (R-Calif.) is asking the Obama administration to explain why federal authorities haven't cracked down on the Occupy D.C. protesters camped out in a federal park downtown. In a letter to Interior Secretary Ken Salazar, the chairman of the House oversight committee claimed that the encampment appears to violate a ban on "camping" in the park. Issa also notes that the square was also recently refurbished with $400,000 in new grass, light fixtures and other upgrades, paid for with stimulus money.