Now that Hillary Clinton has reached the delegate number required to win the Democrat presumptive nomination, according to the Associated Press, some voters feel they are caught between a rock and a hard place.

Supporters of Bernie Sanders, particularly younger African-Americans who are concerned about Donald Trump's xenophobic stance, feel they have no choice but to endorse Clinton.

And the President has inadvertently provided the social media generation with the perfect hashtag for them to reluctantly show their support for the presumptive Democrat candidate, by tweeting #GirlIGuessImWithHer.

Barack Obama yesterday endorsed his one-time rival to be his successor, signaling to Democrats it was time to unify after a bitter primary campaign and beat Donald Trump.

'Tens of millions of Americans made their voices heard. Today I just want to add mine,' Obama said in a video endorsement. 'I'm with her.'

The liberal anti-Clinton brigade have seized on the soundbite, and slightly tweaked it as a way of voicing their collective sigh.

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The liberal anti-Clinton brigade have seized on Obama's 'I'm with her' soundbite, and slightly tweaked it as a way of voicing their collective sigh

Supporters of Bernie Sanders who are concerned about Donald Trump's xenophobic stance feel they have no choice but to endorse Clinton

#GirlIGuessImWithHer

Me and the rest of the Bernie supporters headed to the polls in November like ... pic.twitter.com/C0Q4ORZ0zx — Aᴋ (@aksala13) 8 June 2016

#girliguessimwithher is everything we're all feeling rn. i'm way too emotional today. #BernieSanders pic.twitter.com/WaGdk2Gc85 — Jill Danielle Fisher (@JillDanielle) 8 June 2016

Obama's endorsement was a shot in the arm for the Clinton campaign.

She has struggled for a year against leftist rival Bernie Sanders. The 74-year-old ran an unlikely grassroots campaign that swelled to a 12-million-strong movement.

Clinton finally clinched the nomination just days ago, prompting Obama to offer his backing.

Hillary Clinton (pictured on Monday afternoon in Los Angeles) has reached the number of delegates needed to clinch the Democratic presidential nomination

Obama has endorsed his one-time rival to be his successor. 'Tens of millions of Americans made their voices heard. Today I just want to add mine,' Obama said in a video endorsement. 'I'm with her.' Above, Hillary Clinton's Snapchat account after receiving the President's support

HILLARY AND THE 'SUPER PREDATORS' GANG COMMENT Hillary Clinton was heckled in February at her own fundraiser by a Black Lives Matter activist. The activist demanded an apology from the former first lady for mass incarceration and her claim 20 years ago that children in gangs had become 'super-predators'. The Huffington Post identified the protester as Ashley Williams. She says she paid $500 to attend the Clinton fundraiser in Charleston, South Carolina, with an unnamed associate. Williams was there to ask Clinton about a remark she made in Keene, New Hampshire, in January of 1996 while talking about the Violent Crime Control Act. Clinton said at the time that the government must have an 'organized effort against gangs, just as in a previous generation we had an organized effort against the mob'. 'We need to take these people on. They are often connected to big drug cartels. They are not just gangs of kids anymore,' she said. 'They are often the kinds of kids that are called "super-predators." 'No conscience, no empathy. We can talk about why they ended up that way but first we have to bring them to heel and the President has asked the FBI to launch a very concerted effort against gangs everywhere.' Advertisement

'I don't think there's ever been someone so qualified to hold this office,' Obama said.

The 44th president's support gives Clinton a potent surrogate on the campaign trail.

Ex-presidents George W. Bush and Bill Clinton were so toxic by their eighth year in office that would-be successors kept them at arm's length.

By contrast, Obama is still one of the country's most popular politicians.

His approval ratings among black, Hispanic, young and liberal voters are stratospheric.

Clinton welcomed the vote of confidence: 'Honored to have you with me, @POTUS.

'I'm fired up and ready to go!' she tweeted, echoing one of Obama's own campaign rallying cries from 2008.

In that primary race, Obama bested Clinton and eventually became the first black president.

They later made peace, as Clinton became his first secretary of state.

Now the 68-year-old Clinton is trying to make history of her own by becoming the first female commander in chief.

Standing in her way is bombastic businessman Trump.

He has shocked the world by becoming the presumptive Republican presidential nominee.

'Obama just endorsed Crooked Hillary.

'He wants four more years of Obama — but nobody else does!' Trump tweeted.