The Obama administration on Wednesday decried a ruling by a federal judge that blocks rules for hydraulic fracturing, saying the decision prevents regulators from using “21st-century standards” to ensure that oil and gas operations are conducted safely on public lands. Jessica Kershaw, a spokeswoman for the Interior Department, said “modernized fracking requirements” imposed by Interior Secretary Sally Jewell reflect best industry practices and are aimed at ensuring adequate well control, preventing groundwater contamination and increasing transparency about the materials used in fracking. Kershaw’s comments came after a judge in Wyoming ruled late Tuesday that federal regulators lack authority to set...