NBC has an interesting numbers-crunching summary here on how much each candidate raised, and how fast they are spending it, and how much they have left.
Six things we've learned from the 2020 candidates' fundraising reports
Bernie Sanders' Fox News Town Hall was well received, with a mixed crowd responding positively to his messaging on Medicare for All:
Even the conservative of yester-year
National Review thought Sanders did well:
Bernie Sanders Shines on Fox News
Nathan J. Robinson makes a good argument as to why it is hypocritical for Sanders to retain his millions but campaign against a system that creates massive wealth inequality:
Why Bernie Sanders Should Give His Millions Away