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President Donald Trump has delivered his second State of the Union address to a joint sitting of Congress, calling for the rejection of "the politics of revenge, resistance, and retribution", even as he launched fresh attacks on Democratic leaders.

The border wall and immigration dominated the president's speech, but he also used the occasion to cheer the United States as having "far and away the hottest economy anywhere in the world" and remarked on his administration's successes with regards to low unemployment rates, falls in pharmaceutical drug prices and a "revolution" in energy production.

Trump also announced that he would hold a second summit with North Korean leader Kim Jong Un in Vietnam on February 27-28. “If I had not been elected president of the United States, we would right now, in my opinion, be in a major war with North Korea,” he declared.