President Trump on Friday sought to exacerbate tensions among Democrats, retweeting a Fox News segment on 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.) criticizing former President Barack Obama Barack Hussein ObamaObama calls on Senate not to fill Ginsburg's vacancy until after election Senate Republicans face tough decision on replacing Ginsburg Cruz: Trump should nominate a Supreme Court justice next week MORE's decision to give a high-priced speech to an investment firm.

The Friday "Fox and Friends" clip features Warren saying she was "troubled" by reports that Obama is to receive $400,000 for a September speech.

"One of things that I talk about in the book is the influence of money," Warren said in a Sirius XM interview rebroadcast on Fox. “I describe it as a snake that slithers through Washington. And that it shows up in so many different ways here in Washington.”

Former President Obama's $400K Wall Street speech stuns liberal base; Sen. Warren saying she "was troubled by that" pic.twitter.com/mEc9YZr1pD — FOX & friends (@foxandfriends) April 28, 2017

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Obama reportedly agreed to speak at Cantor Fitzgerald LP’s healthcare conference in September for $400,000.

The reports are stirring divisions among Democrats, with many progressives criticizing Obama.

The issue loomed large in the 2016 Democratic presidential primaries, when Hillary Clinton Hillary Diane Rodham ClintonWhat Senate Republicans have said about election-year Supreme Court vacancies Bipartisan praise pours in after Ginsburg's death Trump carries on with rally, unaware of Ginsburg's death MORE faced frequent criticism from opponent Sen. Bernie Sanders Bernie SandersKenosha will be a good bellwether in 2020 Biden's fiscal program: What is the likely market impact? McConnell accuses Democrats of sowing division by 'downplaying progress' on election security MORE (I-Vt.) for her paid Wall Street speeches. It also came up during Clinton’s general election campaign against Trump.

An Obama spokesman defended the former president this week, noting he instituted Wall Street reform during his tenure despite raising significant campaign funds from the financial sector.