The Trump administration is suspending leases for five large-scale offshore wind projects under construction on the East Coast due to what it said were national security risks identified by the Pentagon. The pause is effective immediately and will give the Interior Department, which oversees offshore wind, time to work with the Defense Department and other agencies to assess the possible ways to mitigate any security risks posed by the projects, the administration said. The statement did not detail the national security risks. It is the latest step the administration has taken to hobble offshore wind in its push against renewable energy sources.