Trump also said the US Treasury Department will announce measures on Tuesday to slap an additional "large" sanction against the DPRK.
Trump reiterated on Sunday that the United States would pull its troops out of Syria but suggested the move might not happen soon.
Trump has made clear that he would seek a second term since taking office early 2017.
Trump tweeted Thursday that he would place an additional 10 percent tariff on the remaining 300 billion US dollars worth of Chinese imports starting on Sept 1.
Trump made clear to aides, according to the Post, that he would participate in the next book.
Trump last Thursday also said he is exploring whether the census, which the US Constitution requires be carried out every 10 years, can be delayed.
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Trump said he would travel to Las Vegas on Wednesday to meet with victims, their family members and first responders.
Trump also has objected to US intelligence community analyses of major issues - from Iran's nuclear program to North Korea - that have clashed with his own assessments.
Trump and Kim held their first summit in Singapore last June. Trump said in Singapore that the US would stop war games with the ROK "unless and until we see the future negotiation is not going along like it should". He also said the drills were "very expensive" and "provocative … war games".
Trump told the nation's governors Thursday that the federal government plans to provide a coronavirus risk assessment for individual counties to decide whether to maintain, increase or relax current social distancing guidelines.