Having backed Trump so comprehensively, and backed the wrong horse, Nigel has to try and save his last shreds of dignity.
That means he has to refer to Trump's loss as a 'temporary setback' and his future being re-elected - which is fantasy on both counts.
The reality is, Trump has lost, whether he likes and admits it or not, and his chance of being re-elected is probably slightly behind The Man In The Moon.
There comes a time when dignity and facts have to take the lead over hubris and fantasy, and for Trump and Farage, that time is now.