Hillary Clinton fired back at Donald Trump on Twitter. | Getty Clinton tweets Trump: 'Delete your account'

The 2016 general election Twitter wars have begun.

"Obama just endorsed Crooked Hillary. He wants four more years of Obama—but nobody else does!" Donald Trump tweeted Thursday after Hillary Clinton's campaign shared a video of President Barack Obama endorsing Clinton as the Democratic nominee.



Advertisement Obama just endorsed Crooked Hillary. He wants four more years of Obama—but nobody else does! — Donald J. Trump (@realDonaldTrump) June 9, 2016

Minutes later, Clinton fired back on Twitter, urging the tweet-happy presumptive Republican nominee to cease and desist.

Just before 4 p.m., Clinton's tweet had been retweeted more than 135,000 times, making it the most retweeted of the campaign, according to Alex Wall, the Clinton campaign's social media director. It also became Clinton's most retweeted tweet ever, according to the company.