Trump's signature, which Leong said looked like "arrows or skyscrapers", points to people who "tend to wear a mask to hide their true nature". That marked a significant walk-back from previous statements by USA officials, who had said they wanted a quick process and a significant show of good will from the North.
A few other conservatives expressed dismay at seeing the United States and North Korean flags side-by-side, and viewed Mr Trump's solicitous manner and warm words for Mr Kim as too much, given his nation's history of human rights violations.
The historic agreement came after the two leaders held several meetings throughout the day. Appearing in front of the media after the bilateral talks with North Korean leader, Donald Trump said that the meeting with Kim Jong-un was 'better than anybody could have expected.' As the two leaders met, Singapore navy vessels and air force Apache helicopters patrolled, while fighter jets and a Gulfstream 550 Airborne Early Warning aircraft circled.
In November 2017, after returning to Washington from a 12-day, five-nation trip to Asia, President Trump stood in the Diplomatic Reception Room of the White House and insisted that he and President Xi had agreed they "would not accept a so-called "freeze for freeze" agreement like those that have consistently failed in the past".
"We will be stopping the war games, which will save us a tremendous amount of money", Mr Trump said, labelling the exercises "inappropriate" and "very provocative". "The United States and North Korea have been in a state of antagonism for more than half a century", China's foreign minister told reporters in Beijing after the Trump-Kim summit.
"Sanctions are a means, not an end", Geng said.
"After the luncheon, the top leaders had a walk, deepening friendly feelings", the KCNA reported, calling the summit an "epoch-making meeting".
Setting out the USA position before the summit, Pompeo stressed that the Trump administration would only accept complete denuclearisation of the North. Kim is likely to leave this afternoon while Trump will depart tonight. "We overcame all kinds of scepticism and speculations about this summit and I believe that this is good for the peace", he said.
Mr Kim's late father and predecessor, Kim Jong-il, was a Hollywood film buff, with a special affection for director Steven Spielberg and actress Elizabeth Taylor and an extensive video library, according to defectors and intelligence agencies. He first impressed with his historic meeting with South Korean President Moon Jae-in at the border village of Panmunjom in April. But there have been slight differences in recent comments among senior US officials as to whether that means North Korea must first complete denuclearization - and have it verified - or if some goodwill steps would be enough.
Republican Senator John Kennedy said, "Kim Jong Un is a butcher, and he is a butcher of his own people".
He and his entourage visited the Marina Bay Sands hotel and casino, ascending to the 57th floor for a bird's-eye view of the nightscape.
Media captionTrump Kim summit: Win-win, or a Kim win?