Bill Barr told Trump "You lost and anything else is bullshi&". 

Ivanka said that she believed Bill Barr and the "EVIDENCE"

See, that's the thing - There was no EVIDENCE of any wide-spread fraud. 

Old guy and Angry man want to believe in conspiracy theories...

Speaking of Psychology: Why people believe in conspiracy theories, with Karen Douglas, PhD (apa.org)

Here's a little about why people believe in conspiracy theories

Suggest you Trump supporters read it. It may be good for your mental health.