The US president now takes on his arch nemesis North Korea's Kim Jong Un in his State of the Union address:

>> No regime has oppressed its own citizens more totally & more brutally than the cruel dictatorship in North Korea. Its reckless pursuit of nuclear missiles could very soon threaten our homeland. We are waging a campaign of maximum pressure to prevent that from ever happening

Trump tells the story about North Korean defector Ji Seong-ho, who Trump says travelled thousands of miles on crutches across China and Southeast Asia to freedom.

He lifts a pair of crutches high and is cheered. He keeps the crutches up. Its a powerful image.