Wsj Opinion: Potomac Watch

After at least 19 Russian drones enter Polish airspace, with some shot down by allied fighter jets, President Trump says it could have been a "mistake." But is this more likely a calculated provocation by Vladimir Putin, perhaps his way of testing the West? Meantime, Trump suggests big sanctions on Russian energy might be coming, though his terms look like a way to delay. Learn more about your ad choices. Visit megaphone.fm/adchoices