Given the importance surrounding the on-again, off-again, and back on-again meeting between these two, it's hard to foresee what possible support that Rodman could offer these leaders in their high-wire negotiations.
The streets were lined with press and onlookers with cell phones as Trump's motorcade made its way from his hotel.
Apart from the presence of the two global leaders in Singapore, the reason behind putting a heightened security in place is also that Kim faces a massive amount of global criticism due to his high-handed regime and records of human rights abuse.
Trump was quiet after touching down in Singapore on Sunday night but was back online first thing Monday morning, engaging Trudeau again in a war of words.
He said he did not discuss a possible meeting venue with Trump but "many" countries including Austria were keen to help in organising such a summit. China and South Korea would have to sign off on any legal treaty.
Seoul's Unification Ministry says the surveys conducted through home visits, phone calls and letters will continue through August 10.
"I feel that Kim Jong-un wants to do something great for his people", he said.
North Korea has long demanded a treaty that may be aimed at getting United States troops off the Korean Peninsula and, eventually, paving the way for a North Korean-led unified Korea. "The North Koreans have already gotten one major concession: a meeting with the president".
Senior US officials, echoing what Trump has said in recent days, said that at a minimum they would like the summit to serve as a start of a dialogue with North Korea. The official was not authorized to speak publicly about internal deliberations and insisted on anonymity.
But a series of diplomatic overtures involving North Korea, South Korea and the United States reduced tensions and led Trump in March to quickly accept Kim's invitation to meet.
Mr Trump has said it normally takes him about five seconds to figure out whether he will get along with someone.
An Air China plane believed to have North Korean leader Kim Jong-un on board makes its final approach into Changi Airport in Singapore on June 10, 2018. Though North Koreans have been left largely in the dark about the summit, the reports of his arrival came relatively quickly by North Korean standards.
Kim's flight path meanwhile appeared to maximise time spent in Chinese airspace during the journey, including veering off to pass over the southernmost province Hainan Island, according to Flight Radar 24, a Swedish website providing real-time data.
The meeting marks a sharp turnaround in the status of Mr Kim from worldwide pariah to global player.
"The success will be in the shutter clicks of the cameras", he said.
While Kim has shown he's willing to bargain, O'Hanlon said, "Giving up his nuclear weapons is probably going to be the last step in that process, not the first step".
Menendez also stresses that getting a nuclear deal with North Korea will not be the hard point, noting that several previous presidents were able to strike deals only to see them fall apart.