(CNN) Chinese, Iranian and North Korean attempts to meddle in the 2018 US elections are, like Russia's efforts, "a sufficient national security concern," White House national security adviser John Bolton said Sunday.

"I can say definitively that it's a sufficient national security concern about Chinese meddling, Iranian meddling and North Korean meddling that we're taking steps to try and prevent it," Bolton said Sunday on ABC's "This Week."

When asked by Martha Raddatz about President Donald Trump's statement on Twitter Saturday morning that those focused on Russian meddling "should start also looking in another direction, China," Bolton said "all four of those countries" are a concern.

All of the fools that are so focused on looking only at Russia should start also looking in another direction, China. But in the end, if we are smart, tough and well prepared, we will get along with everyone! — Donald J. Trump (@realDonaldTrump) August 18, 2018

Bolton declined to say whether he had seen examples of Chinese election interference in the past, but stressed that "looking at the 2018 election, those are the four countries that we're most concerned about."

Bolton also said Sunday that he intends to discuss evidence of Russian attempts to interfere with the 2018 election during his meeting with Kremlin officials in Geneva on Thursday.

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