President Obama JUST Joined Facebook... and the Trolls Are Out in Full Force!

We bet Malia and Sasha are like, "Dad, really? You're on Facebook now?!"

LOL... President Obama just joined Facebook on Monday.

And forget a selfie, the POTUS posted a "Hello, Facebook" video to make his debut. And to discuss dad stuff, like you know, how much he loves his back yard. Ha.

But don't get it twisted, he sprinkled in important stuff, too... like tackling climate change.

Almost as quickly as the video went up, the trolls came out.

Some funny...

Some cruel...

But as you know, haters gonna hate...

Click here to pop the top and Welcome President Obama to 2015!