Nicolás Maduro unleashes a fiery warning as the U.S. seizes a tanker off Venezuela’s coast, escalating the standoff. #foxnews #news #us #fox #fox #media #breakingnews #us #usa #new #news #breaking #foxnews #maduro #nicolasmaduro #venezuela #caracas #oil #energy #tanker #warning #crisis #international #diplomacy #geopolitics #politics #political #politicalnews #government Subscribe to Fox News: https://bit.ly/2vBUvAS Watch more Fox News Video: http://video.foxnews.com Watch Fox News Channel Live: