Republican presidential hopeful Donald Trump thinks President Obama's intensified focus on climate change amid the growing threat of militant Islamic terrorism is "ridiculous."

The outspoken billionaire, who says he is "not a believer" in global warming, ridiculed Obama in one of his usual Instagram videos Tuesday.

"While the world is in turmoil and falling apart in so many different ways, especially with [the Islamic State], our president is worried about global warming," a stern-faced Trump said.

The 15-second video is the second web-based ad posted by Trump in the last 24 hours. In a similar video uploaded Monday, Trump placed clips of Obama laughing in between news coverage of the Islamic State's recent threats against the U.S. and Europe.

Read more on WashingtonExaminer.com