Donald Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE is using Barack Obama Barack Hussein ObamaMomentum growing among Republicans for Supreme Court vote before Election Day Warning signs flash for Lindsey Graham in South Carolina Majority of voters say Trump should not nominate a Supreme Court justice: poll MORE's attack lines against Hillary Clinton Hillary Diane Rodham ClintonJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Momentum growing among Republicans for Supreme Court vote before Election Day Warning signs flash for Lindsey Graham in South Carolina MORE.

A day after the president endorsed his 2008 rival, Trump released a new video that hits Clinton with a 2008 radio ad from Obama's campaign.

"Hillary Clinton will say anything to get elected," a narrator says in the 2008 audio. It also criticizes Clinton's support for the Iraq War, and the narrator saying that Clinton will "say anything and change nothing."

Trump added in his tweet that Obama was "100% correct" about Clinton in his 2008 ad, calling it a "great ad!"

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The video Trump tweeted includes the majority of the original 60-second ad from Obama.

The GOP candidate regularly drudges up past comments from rivals to attack them.

Obama on Thursday hailed Clinton as perhaps the most qualified person to ever run for the White House.

"I know how hard this job can be. That's why I know Hillary will be so good at it. In fact, I don't think there's ever been someone so qualified to hold this office," Obama said.

Democrats have closed ranks around Clinton as their presumptive nominee, with a slew of top party figures throwing their support behind Clinton, including Vice President Biden and Sen. Elizabeth Warren Elizabeth WarrenBiden's fiscal program: What is the likely market impact? Warren, Schumer introduce plan for next president to cancel ,000 in student debt The Hill's 12:30 Report - Presented by Facebook - Don't expect a government check anytime soon MORE (D-Mass.).