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In an interview with Axios' Mike Allen for "Axios on HBO," economists Emmanuel Saez and Gabriel Zucman, who helped guide Democrat Sen. Elizabeth Warren's 2020 wealth tax plan, said America has entered a new Gilded Age.

The big picture: Warren's "ultra-millionaire tax" is one of the most progressive tax plans on the Democratic market. It aims to adjust rates so that the rich are not paying less, proportionately, in taxes than the wealthy. Opponents of the plan argue it would de-incentivize investments and stifle economic growth.

  • A paper released by Saez and Zucman in September analyzed how the plan would have affected the 15 wealthiest Americans' fortunes if it was in place since 1982. It found that subjects' net worth could have decreased by more than half.

What they're saying: "You look at the numbers and it's very similar to the Gilded Age... Taxation was very regressive during the Gilded Age," Zucman said.

  • Saez also argued America is facing new monopolies: "The equivalent of the Gilded Age today, are the Microsofts, the Apples, the Amazons — incredible companies that really transform the world, but you can see that they really monopolize things because everybody goes, you know, to the same provider and that dominates, entirely, the market."

Go deeper: Elizabeth Warren: What to know about the 2020 candidate's wealth tax proposal

Go deeper

Trump political team disavows "Patriot Party" groups

Marine One carries President Trump away from the White House on Inauguration Day. Photo: Patrick Smith/Getty Images

Donald Trump's still-active presidential campaign committee officially disavowed political groups affiliated with the nascent "Patriot Party" on Monday.

Why it matters: Trump briefly floated the possibility of creating a new political party to compete with the GOP — with him at the helm. But others have formed their own "Patriot Party" entities during the past week, and Trump's team wants to make clear it has nothing to do with them.

DOJ watchdog to probe whether officials sought to alter election results

Donald and Melania Trump exit Air Force One in West Palm Beach, Fla., on Jan. 20. Photo: Alex Edelman/AFP via Getty Images

The Justice Department's inspector general will investigate whether any current or former DOJ officials "engaged in an improper attempt to have DOJ seek to alter the outcome" of the 2020 election, the agency announced Monday.

Driving the news: The investigation comes in the wake of a New York Times report that alleged Jeffrey Clark, the head of DOJ's civil division, had plotted with President Trump to oust acting Attorney General Jeffery Rosen in a scheme to overturn the election results in Georgia.

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