Donald Trump has used his first TV interview since losing the US Presidential election to attack the FBI for not investigating his unsubstantiated claims of voter fraud. At one point he even appeared to accuse his own FBI of ‘maybe being involved’ in an alleged conspiracy to rig the election in favour of Democratic rival Joe Biden. The outgoing US president appeared on Fox News on Sunday for a rambling 45 minute interview in which he repeated claims the election was ‘rigged’ without providing evidence.