Barack Obama Fires Back at Trump's 'Obamagate,' 'Vote,' He Urges Supporters

After President Donald Trump went on a Twitter tirade about his predecessor, former President Barack Obama took to social message with a pared-down response.

“Vote,” Obama tweeted, posting similar entreaties on Facebook and Instagram.

Earlier, Trump retweeted his accusation of “Obamagate” and demanded Senate Republicans call on the former president to testify on Capitol Hill about "the biggest political crime and scandal in the history of the USA" and claiming Obama "knew EVERYTHING."