evidence: Republicans have long scrutinised President Biden's son, Hunter Biden, for his business dealings abroad. [...] They also allege that Joe Biden participated in phone calls with Hunter Biden's business associates to benefit his son, stymied the investigation into his son's taxes and took part in an alleged - but unsubstantiated - bribery scheme. US outlet Axios reported Wednesday that two claims previously made by Joe Biden - that he had not met any of his son's Ukrainian business associates while vice-president, except maybe for a brief hello, and that his son had not made any money from China - were false, according to testimony from Hunter Biden and his business partner Devon Archer.