I unashamedly quote this paragraph from Martin Wolf's article on Donald Trump in the FT this morning:
The fact that Mr Trump can be a credible contender for the presidency is astounding. In business, he is a serial defaulter and litigator turned reality TV star. He is a peddler of falsehoods and conspiracy theories. He utters racist calumnies. He attacks theindependence of the judiciary. He refuses to reveal his taxes. He has no experience of political office, and incoherent policies. He glories in ignorance. He even hints at a federal default. He undermines confidence in the US-created trade order, by threatening to tear up past agreements. He undermines confidence in US democracy by claiming the election will be rigged. He supports torture and the deliberate killingof the families of alleged terrorists. He admires the former KGB agent who runs Russia.