President Biden's announcement last week declaring a ban on the import of Russian oil and gas to the United States comes as welcome news. It accedes to bipartisan demands from Congress, as well as President Volodymyr Zelensky. But it doesn't go far enough. In addition, the president should declare a national energy emergency. Declaring a national emergency would empower the president to intervene in energy markets to shield American consumers from bearing too much of the burden through fast-increasing prices at the pump, which have hit record highs. Although the president cannot directly impose price controls, declaring an energy emergency...