There are a ton of Democrats who fear losing to Trump in the key battleground states, by running too progressive of a candidate (pushing everything is free).
Many say Biden/Klobuchar ticket is a lock. I still have huge reservations whether Biden can go the distance w/ fading acuity. IMO, his only shot is to announce he will serve one term to repair the damage, and then retire for good.
But, Warren is a real contender -- sharp mind, great communicator, fearless and bold. Her bottom line is to fix the corruption and $$ influence in DC -- what Trump promised but did the complete opposite.
I am the minority opinion among friends and family, in that I believe there is an Army of young voters who will be more inclined to show up for a progressive ticket vs a Joe Biden ticket. How many voters does a progressive ticket chase away vs how many new voters show up for a progressive ticket, ... is the question. The primaries will sort all that out.
Trump still has the economy, -- hands down -- what gives him a real shot. Yet, educated suburban voters (presumably the biggest beneficiaries of the economy) are tired of the noise and clown act.
Still plenty of runway left. World events may indeed dictate what happens in 2020.