Trump's retweet also comes on the heels of him publicly criticizing his hand-picked attorney general, Jeff Sessions, for not being tough enough on leakers.
Hours later, UN Ambassador Nikki Haley appeared on Kilmeade's show and co-host Steve Doocy asked Haley about the story about North Korean missiles on "the frontpage of FoxNews.com". What can you tell us about us about that? "I can't talk about anything that's classified", Haley told Fox News. "I have no reason to comment on it".
"I don't know what's going on, but I will tell you it's incredibly risky". You're not only just getting a scoop on something - you're playing with people's lives.
She added, when asked if the information was leaked, "it's one of those things I don't know what's going on". And this has got to stop.
A White House spokesman did not immediately respond to a question about whether Trump's retweet amounted to a confirmation of Fox's story, which was attributed to unnamed "U.S. officials with knowledge of the latest intelligence in the region".
In May, Trump was criticized after The Washington Post reported that he shared highly classified information with the Russian foreign minister and Russian ambassador to the U.S. in a White House meeting.
Meanwhile, on a flight to Guam, which North Korea threatened to launch missiles against after President Trump's violent rhetoric, Secretary of State Rex Tillerson aimed to reassure the nation.
"I have no concerns about this particular rhetoric of the past few days", he said, adding he thinks Trump, "as Commander-in-Chief felt it necessary to issue a very strong statement".