The people here who seem to think any Democrat will do, so long as it removes Trump, are playing into their hands.
On first reading, I actually didn't even catch the third word, "here". But I'm going to argue that the same applies for anyone on A2K or in the national liberal camp.
I'm going to take a more extreme position than Hightor. I do think that any
Dem candidate (drawn from the pool already or soon to be announced) will do. The immediate and critical goal must be to remove Trump from office. The smart people I read suggest that the Senate will be very difficult to flip (structural features including gerrymandering). So even if the House remains in Dem control, nothing will change.
If nothing changes and Trump wins, likely two more Supreme Court seats will be taken over by Gorsuch type extremists. That means Roe v Wade will be overturned. It will mean the Koch crowd and all the corporate entities will be permitted to eviscerate controls on their behaviors. Global warming will remain totally unaddressed at this point where immediate address is critical. Further and more extreme gerrymandering moves will mostly be permitted. Attacks on the mainstream press and legal findings that penalize and silence reporters and papers for criticizing Trump will increase in the direction of authoritarian governments. The present appointments of industry lobbyists to government positions (meant to police those industries) will increase. The on-going project of education falling under private control will have nothing other than citizen protest to stop it and that won't stop it. The religious right will make many further gains not merely in school curricula and abortion control but also in criminalizing behavior they deem ungodly and in legalizing discrimination on the basis of creed, race and religion. Gun control laws will be challenged up to the SC and NRA-friendly rulings should be expected. Military adventures abroad? Try to imagine how ugly that could get. The growing tendencies in Europe towards white nationalism and anti-migrant policies will be encouraged by Trump and those around him and those entities will coordinate with their counterparts in the US.
That is some of what will happen and if that wasn't bad enough, we'd also better face what will happen to the left if Trump wins again. Fracturing, anger, grief, apathy will all mark the emotional state of each of us. The Dem party may not survive this. And even if it does, the left in America will become like the left in Israel - fundamentally disorganized and powerless. America will be done for as a representative democracy.
So, yeah. Any Dem arriving in the WH will be not merely better but absolutely necessary. This is the sort of crisis that marks a possible turning point in world history. One direction is a struggle. The other is a total disaster.