Washington (CNN) President Donald Trump continued to defend his budding relationship with North Korean leader Kim Jong Un on Monday, demanding credit for his role in making "initial steps toward a deal" by establishing a personal rapport with the young dictator during last week's summit in Singapore.

"If President Obama (who got nowhere with North Korea and would have had to go to war with many millions of people being killed) had gotten along with North Korea and made the initial steps toward a deal that I have, the Fake News would have named him a national hero!" Trump tweeted.

If President Obama (who got nowhere with North Korea and would have had to go to war with many millions of people being killed) had gotten along with North Korea and made the initial steps toward a deal that I have, the Fake News would have named him a national hero! — Donald J. Trump (@realDonaldTrump) June 18, 2018

Amid lingering skepticism over North Korea's commitment to complete denuclearization in the wake of the Singapore summit, Trump has aggressively pushed the idea that Kim is sincere in his intentions and that the two leaders were able to develop a unique chemistry.

It's a conviction South Korean officials share. South Korean Vice Foreign Minister Lim Sung-Nam said Monday in Washington that any diplomatic progress should be credited to the connection that Trump and Kim established through an "unprecedented top-down approach" to negotiations.

"The actors for this top-level diplomacy are completely different leaders as compared to the past," Lim told an audience at the Center for Strategic and International Studies. "Moreover, the personal chemistry between them has been unique as well."

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