@TB is running the math too and the answer is yes. It's doable but well within recount territory.
I'd like to highlight the popular vote trend here. It's currently about 3.8 million and 50.5% for Biden, a genuine majority. Hillary never had an actual majority, she ended with 48% and a lead of about 2.9 million.
And California has only counted 74% of its vote. I already did the math, based on current CA numbers, Biden will
add to his gap about 2.7 million votes, just from CA. That puts him at about a 6.5 million popular vote lead, or probably over a 51% majority.
There are several Trump states still counting of course, most with about 90% left to go, so Trump's total will obviously increase. But Biden's gap will increase quicker, because not only will CA dump a whopping 2.7 million votes for him, but IL, MD, NJ, NY, and MA are all at 85% complete or less. I did the math on Chicago too - Cook County alone will add over 400,000 votes to Biden's gap. Manhattan is favoring Biden by 84% and is only
60% complete! Biden looks to gain over 300,000 votes from Manhattan alone, let alone the other buroughs combined - Bronx and Brooklyn are 74 and 77% complete respectively, likely combining for another 300,000 votes. Newark NJ is 74% complete, Rockville MD is 64% complete, Baltimore MD is only 60% complete.
CA will feed Biden 2.7 million more popular votes but all these other strongholds could feed him another 2 million, maybe more. A lead of 8 million in the popular vote and a 52% majority is plausible by certification time.