Hunter Biden says he’s under federal tax investigation

• President Trump's attempts to investigate Hunter Biden's foreign business dealings have been a central line of attack by Trump and his allies.

What they're saying: Hunter Biden wrote in a statement, "I take this matter very seriously but I am confident that a professional and objective review of these matters will demonstrate that I handled my affairs legally and appropriately, including with the benefit of professional tax advisors."

• The Biden-Harris presidential transition team wrote in an accompanying statement: "President-elect Biden is deeply proud of his son, who has fought through difficult challenges, including the vicious personal attacks of recent months, only to emerge stronger."