The European Commission proposed introducing mandatory gas-saving targets for all EU member states if supplies deteriorate to a crisis level in a winter emergency plan unveiled on Wednesday. “We have to prepare for a potential full disruption of Russian gas, and this is a likely scenario,” said Ursula von der Leyen, president of the commission, in a Brussels press conference. Mounting EU concerns over energy supplies, especially gas, have increased as Russia throttled deliveries in recent months amid the war in Ukraine, viewed as retaliation for Western sanctions. Deliveries of Russian gas to …