Along with the president himself, the vast majority of Republican politicians have refused to accept Trump's election loss.
The former president George W Bush was among a handful of Republicans who have congratulated the Biden-Harris team, while the senate majority leader, Mitch McConnell, said Trump was '100% within his rights' to question election results.
The US attorney general, William Barr, has authorised federal prosecutors to begin investigating 'substantial allegations' of voter irregularities
- Barr tells prosecutors to investigate 'vote irregularities' despite lack of evidence
- Donald Trump has no intention of conceding, campaign insists
- Will Trump accept defeat and leave the White House? Yes, experts say