Democrats seem to forget what happened in 2016 when Hillary raised DOUBLE that of Trump with $1.2B and he raised $600M.
Biden so far has about $710M and Trump has about the same as 2016 with $596M.
If anything, Democrats should be concerned that they're basically only raising half of what they did for Hillary in 2016.
I read on American Thinker that Hillary outraised Trump by 4:1 margin in 2016. She raised $1.2B vs. Trump’s $300M. But Trump trounced Hillary in the number of small donors which is a good measure for the widespread support he was getting from ordinary folks.