Donald Trump has said he had nothing to do with any potential prosecution of Joe Biden's son, Hunter, who has disclosed that his taxes are being investigated by a federal prosecutor.
Mr Trump was impeached by the US House of Representatives in December 2019 stemming from his efforts to pressure Ukraine to investigate Joe and Hunter Biden.
Mr Trump was acquitted by the senate in February.
"I have nothing to do with the potential prosecution of Hunter Biden, or the Biden family.
"It is just more Fake News. Actually, I find it very sad to watch," the US president wrote on Twitter.
His post came a day after Jeffrey Rosen, the incoming acting attorney general, declined to say whether or not he would appoint a special counsel to investigate Hunter Biden.
Mr Trump, due to leave office on January 20, has privately been mulling whether to pressure the justice department to appoint a special counsel to look into Hunter Biden, according to a person familiar with the matter.
Installing a special counsel would make it more politically difficult for the new attorney general in the incoming Biden administration to simply dismiss the matter.
Hunter Biden recently disclosed that his tax affairs were under investigation in Delaware.
The president-elect's son has long been the subject of Republican attacks. Mr Trump often mentioned him in his campaign rallies.
Mr Trump and his allies have raised questions about potential conflicts of interest from Hunter Biden's position on the board of the Ukrainian energy company Burisma at the time his father was vice president.