Nearly two years into his presidency and more than six months after his historic summit meeting with Kim Jong-un of North Korea, President Trump finds himself essentially back where he was at the beginning in achieving the ambitious goal of getting Mr. Kim to relinquish his nuclear arsenal.

That was the essential message of Mr. Kim’s annual New Year’s televised speech, where he reiterated that international sanctions must be lifted before North Korea will give up a single weapon, dismantle a single missile site or stop producing nuclear material.

The list of recent North Korean demands was a clear indicator of how the summit meeting in Singapore last June altered the optics of the relationship more than the reality. Those demands were very familiar from past confrontations: that all joint military training between the United States and South Korea be stopped, that American nuclear and military capability within easy reach of the North be withdrawn, and that a peace treaty ending the Korean War be completed.

“It’s fair to say that not much has changed, although we now have more clarity regarding North Korea’s bottom line,’’ Evans J.R. Revere, a veteran American diplomat and former president of the Korea Society, wrote in an email.