https://www.wbur.org/npr/545812242/1-in-10-sanders-primary-voters-ended-up-supporting-trump-survey-finds#:~:text=Here%27s%20How%20Many%20Bernie%20Sanders%20Supporters%20Ultimately%20Voted%20For%20Trump
And
https://ballot-access.org/2017/08/25/survey-shows-fewer-than-80-of-bernie-sanders-who-voted-in-general-election-voted-for-hillary-cli…
https://www.wbur.org/npr/545812242/1-in-10-sanders-primary-voters-ended-up-supporting-trump-survey-finds#:~:text=Here%27s%20How%20Many%20Bernie%20Sanders%20Supporters%20Ultimately%20Voted%20For%20Trump
And
https://ballot-access.org/2017/08/25/survey-shows-fewer-than-80-of-bernie-sanders-who-voted-in-general-election-voted-for-hillary-clinton/#:~:text=in%202020%20%E2%86%92-,Survey%20Shows%20Fewer%20than%2080%25%20of%20Bernie%20Sanders%20Supporters%20Who%20Voted%20in%20General%20Election%20Voted%20for%20Hillary%20Clinton,-Posted%20on%20August
And
https://www.datalounge.com/thread/25379323-here-s-how-many-bernie-sanders-supporters-ultimately-voted-for-trump#:~:text=Here%27s%20How%20Many%20Bernie%20Sanders%20Supporters%20Ultimately%20Voted%20For%20Trump
And