“Our country & civilians are vulnerable today because Barack Obama did not believe in national missile defense. Let’s never forget that,” Bolton said in the tweet that Trump retweeted.
The president also retweeted “The Five,” a Fox News program, which quoted host Jesse Watters as saying that Trump “being unpredictable is a big asset.”
“North Korea knew exactly what President Obama was going to do,” Watters added.
Trump, who has threatened “fire and fury” if North Korea continues its provocations, returned to the subject of Obama on Thursday morning, retweeting a survey by ProgressPolls, which asked: “Who is a better President of the United States?”
The organization asks its 123,000 Twitter followers for thoughts of a variety of “tough questions,” a method that does not produce scientific polling results.
It tweeted on Aug. 4 that 61 percent thought Trump was better, compared to 39 percent who thought Obama was better.
Trump, who is in the middle of a 17-day working vacation at his private golf club in Bedminster, N.J., has not commented on any of the tweets himself.