Trump said he was able to diffuse the situation when he got into office and now has "a very good relationship" with North Korean leader Kim Jong Un.
The president said Japanese Prime Minister Shinzo Abe nominated him for the Nobel peace prize as a result of his efforts with North Korea, but added he will "probably never get it."
"They gave it to Obama, he didn't even know what he got it for," Trump said about his predecessor.
Trump said his administration does "a lot of good work" but doesn't get "any credit for it."
Regarding the ongoing trade talks with China, Trump said he would consider pushing back the March 1 deadline to increase tariffs on Beijing if he sees that the two sides are close to a deal.
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(With inputs from APTN)