A natural gas expansion project spanning portions of New Jersey, Delaware and New York was dealt a legal setback after a federal appeals court vacated the approval of the Federal Energy Regulatory Commission. The U.S. Court of Appeals overturned federal approval of the $1 billion expansion of the Transco natural gas pipeline, which would run through sections of New Jersey and Pennsylvania with extensions stretching into southern New York. The panel ruled that the Federal Energy Regulatory Commission overlooked studies that the market for expanded natural gas in New Jersey was low when it granted approval last year to the...