Tucker Carlson: What the Fox News host is doing in Hungary

US guest of honour and Fox News host Tucker Carlson was granted a lightning visit by military helicopter to Hungary's 175km (109-mile) high-tech, high-cost razor-wire border fence with Serbia this week.

He liked what he saw. After praising the fence for being so "clean and orderly", in contrast to the "chaos" on the US-Mexican border, he told his viewers: "It doesn't require a GDP the size of the US, it doesn't require high-tech walls, guns, or surveillance equipment. All it requires is the will to do it."

And he praised Hungarian Prime Minister Viktor Orban for not allowing "this nation of 10 million people to be changed forever by people we didn't invite in and who are coming here illegally".