Even an inbred domesticated pet can learn simple tricks, but corporate Democrats...Let's just say that they are further down the evolutionary ladder.
Joe Biden proved that today.

"Despite losing in the courts, and in the court of opinion, these forces of intolerance remain determined to undermine and roll back the progress you all have made," he said. "This time they — not you — have an ally in the White House. This time they have an ally. They're a small percentage of the American people — virulent people, some of them the dregs of society."

At least he didn't say "deplorables."
Why do establishment Dems think that insulting a third of the electorate is a good idea?
And why are establishment Dems incapable of learning from 2016? Why do they think Biden is the "solution"?

Amid discussion of resistance to Trump, he surprised me with talk of 2020, when he’ll turn 78. “I’ll run,” the vice president deadpanned, “if I can walk.” Three days later, he informed the Washington press corps that he wasn’t joking.

Biden isn’t likely to run, but keeping the door ajar gives him a bigger voice in Democratic Party debates. The one that worries him most is over repositioning to win back Trump voters. He has little patience with Democrats who want to move either left or right. “ ‘We gotta move to the center,’ ‘We gotta move to those white guys,’ ‘We gotta move to those working-class people’ or ‘We gotta double down on the social agenda.’ ” It’s a false choice, he said: “They are totally compatible. I have never said anything to the A.C.L.U. that I wouldn’t say to the Chamber of Commerce.”

A 75-year old insider that dropped out of the race in 2008, after capturing less than 1% of the vote in the Iowa caucus, and who "occupies the sensible center of the Democratic Party."

That just screams excitement, does it not? /s

And yet the establishment continues to try to force Joe Biden down our throats, but their recent effort is more laughable than most.

Former Vice President Joe Biden leads President Donald Trump by 7 percentage points in a head-to-head match-up, according to a new POLITICO/Morning Consult poll.

A plurality of registered voters, 44 percent, said they’d choose Biden in the 2020 presidential election, while 37 percent of voters said they would vote for Trump.

The percentage of Democrats who would choose Biden — 80 percent — was slightly higher than the 78 percent of Republicans who would vote for the president‘s reelection. The former vice president, who ran for the White House in 1988 and 2008, has been floated as a 2020 contender, and Biden himself has said he’s not ruling out a third try.

OK. You following this so far?
Creepy Joe is the overwhelming favorite, especially amoung Democrats, right?

No. In fact, they are counting on you to not read the very next paragraph, which destroys the entire narrative.

Biden holds a less-than-commanding position within his own party: Among Democrats, an unnamed generic Democrat runs 9 points better than Biden in a match-up with Trump. "Notably, 89 percent of Democrats say they would vote for a generic Democrat over Trump, but only 80 percent of Democrats say they prefer Biden over Trump,” said Morning Consult Managing Director Tyler Sinclair.

In other words, Democrats would prefer almost ANY other Democrat over Biden.
It turns out that Biden was the only Democratic choice given in this poll, which makes it a push-poll.

Because Biden and whoever his supporters may be right now have apparently missed the memo, let's break this situation down.
First, American voters on each side of the traditional partisan aisle are shouting loudly and clearly that they're tired of establishment politicians.
...And now along comes Biden, with his decades in Congress and eight years as vice president portraying himself as a possible great hope?

Please

Let's take a moment to remember who Joe really is.

He voted for the Riegle-Neal Interstate Banking and Branching Efficiency Act of 1994, enabling commercial banks to do business across state lines, and the Gramm-Leach-Blilely Act of 1999, overturning Glass-Steagall, which separated commercial and investment banks....
Biden also demonstrated his fealty to finance in 2005 when he, like Hillary Clinton, backed the innocuously named Bankruptcy Abuse Prevention and Consumer Protection Act, heavily pushed by MBNA, which weakened bankruptcy protections for consumers.
....Biden voted “yea” on the Personal Responsibility and Work Opportunity Reconciliation Act of 1996 referred to as “welfare reform”.
...As Matt Ferner and Nick Wing of Huffington Post reported back in September of 2015, he co-sponsored the Comprehensive Crime Control Act of 1984 which expanded civil asset forfeitures in which law enforcement seize property suspected of being involved in a crime, without Due Process. Ferner and Wing continue on to explain that “Biden authored portions of the Anti-Drug Abuse Act, which created a 100-to-1 sentencing disparity between crack and powder cocaine.”
...Biden was for the 1994 crime bill which, among other things, allocated $10 billion for the construction of new prisons and incentivised states to pass “truth-in-sentencing” laws.

And, of course, Biden voted for the Patriot Act and the Iraq War.

I've enjoyed watching the progressive grassroots give the establishment fits the past couple years, but it needs to win a LOT more battles in the next couple years, because the Democratic Party establishment lacks the slightest clue.
Only a full-scale overthrow of the neoliberals, like what happened with Corbyn in the UK Labour Party, will be enough. The leaders in the Democratic Party are hopeless.