Hunter Biden announced on Wednesday that his taxes are under investigation by the U.S. Attorney's Office in Delaware.

Why it matters: The president-elect's son's foreign business dealings came under scrutiny during the presidential campaign. He said in a statement that he was "confident" the investigation would show no wrongdoing.

• 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: "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," the Biden-Harris transition team wrote in a statement.