Biden - $9 million? I seriously doubt that.
2016 data, IIRC
“Joe Biden Wealth Details: When his term as Vice President ended, Joe Biden’s last financial disclosure pegged his net worth at $1.5 million. For many years before becoming VP, he would frequently refer to himself as one of the “poorest” members of congress, or “middle class Joe”, with a net worth less than $500,000. In the years after leaving the White House he earned significant income mainly from speeches and book royalties, peaking in 2017 with income of $11 million. Between 2016 and 2019 alone Joe and Jill earned a shade under $17 million.”
https://www.celebritynetworth.com/richest-politicians/democrats/joe-biden-net-worth/