We all know the slogan. But Donald Trump will not make America great again by waging war on his domestic enemies. Instead Trump’s vengeance campaign threatens the real foundations of American greatness.

The American military, the country’s leading universities, the Federal Reserve, the justice system, the free press, the scientific establishment, even the health of American citizens are all at risk. The president-elect has nominated vengeful crackpots to key positions and promised to let people like Robert F Kennedy Jr “go wild”.

The damage that Trump’s policies could inflict on America will delight the country’s real enemies in Moscow and Beijing. They know from their own histories that when a nation turns on itself, its international power can collapse.