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State of our (dis)union plays out on social media

Donald Trump says on Twitter that Bernie Sanders is selling out by endorsing Hillary Clinton for president.

Darren McCollester/Getty Images

The unusual race for president in the US continues to agitate the waters of social media.

Hillary Clinton thanked Bernie Sanders, her hard-charging progressive opponent for the Democratic slot, for his Tuesday endorsement, which came more than a month after Clinton had clinched the nomination.

"This is one of the most important elections of our lifetimes. You will always have a seat at the table when I am in the White House," Clinton told Sanders during a rally in New Hampshire. Clinton's campaign also sent out a flurry of tweets touting Sanders' support.

However, Donald Trump, the presumptive Republican presidential challenger, anticipated the official announcement and chimed in early on Twitter, saying Sanders had "sold out" to "Crooked Hillary Clinton." Later, he also made a play for any Sanders supporters who might be feeling betrayed.

The Sanders camp replied to the sell-out remark with a post of its own, dismissing Trump's comment as "big talk" from someone who'd dodged a more direct confrontation.

It's all part of a chaotic 2016 presidential race that's playing out in unprecedented ways online and will only intensify in the weeks and months leading up to Election Day.