Alaska is considering mounting a legal challenge to President Obama's plan to set aside 187,000 square miles in the state as a "critical habitat" for polar bears, a move that could add restrictions to future offshore drilling for oil and gas. Alaska Gov. Sean Parnell questioned the decision, saying the designation was not supported by sound science or good economic analysis. "This additional layer of regulatory burden will not only slow job creation and economic growth here and for our nation, but will also slow oil and gas exploration efforts," he said in a written statement on Wednesday. "We are...