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Donald Trump Jr. challenged Hunter Biden to debate who has benefited more financially from their fathers’ time in public office.

"We can go full transparency, we show everything, and we can talk about all of the places where I'm supposedly grifting, but Hunter Biden isn't," President Trump’s eldest son said in a Sunday interview with Axios HBO.

Trump Jr. stepped in to run the Trump Organization with his brother Eric when their father moved into the White House. When pressed on his book deal and paid speeches, he insisted he has made paid speeches for more than a decade.

"If you looked at my tax returns, which maybe we could talk about in this debate,” he said, later continuing, "Let's talk about who profited off of whose public service. Happy to do it. Let's make it happen."

TJ Ducklo, a spokesman for 2020 Democratic presidential front-runner Joe Biden, responded, "It is hard to believe anything a Trump says on tax returns when Donald Sr. has lied for years about releasing his."

The president and his allies have spent months attacking the former vice president over his son’s business dealings in Ukraine, arguing that it shows the family was corrupt. The younger Biden served on the board of a Ukrainian gas company while his father led the Obama administration’s Ukraine policy.