Hillary Clinton and Bernie Sanders before the CNN Democratic presidential debate on April 14, 2016, in New York. (Jewel Samad/AFP via Getty Images)

Bernie supporters have rallied to Hillary in huge numbers. That’s bad news for Donald Trump, as he was hoping to make a play for these voters.

Donald Trump’s bad month just got worse, because Sanders backers just rallied to Clinton

Donald Trump would like for Bernie Sanders supporters to ditch the Democratic Party and support him. There is very little evidence that they will do that, mind you, but it's certainly possible that they might just stay home — which would help Trump. Well, we have some bad news for the Trump campaign. Sanders supporters aren't just rallying around Clinton; they're doing it rather quickly. And it's a big reason Clinton just extended her lead over Trump into the double digits, 51 percent to 39 percent.

This was to be expected. The agendas of both Bernie and Hillary are very similar, only separated by degree and idea behind finding a solution to a commonly agreed-upon problem.

A new Washington Post-ABC News poll shows that Sanders backers, who polls have shown were reluctant to jump over to Clinton and even flirted with supporting Trump, are coming home faster than we might have expected. Last month, 20 percent of Sanders supporters said they would back Trump over Clinton in the general election. This month, that figure is down to 8 percent.

2016 Sanders backers who say they'll support Trump

Those who backed Bernie in the primary who said they'd vote for Republican Donald Trump over Hillary Clinton in the general election

And the poll was conducted before, we would note, Sanders began saying last week that he would support Clinton over Trump in the general election. (Even as he's not endorsing Clinton and is still technically a candidate, Sanders said his supporters would and should not vote for a "bigot" like Trump.)

The numbers are bound to get even better from here, as Bernie starts telling his supporters not to vote for Trump and punch in for Hillary, as time goes on.

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When asked on MSNBC June 24 if he would vote for rival Hillary Clinton, Democratic presidential candidate Bernie Sanders answered, "Yes." Sanders says he's focused on beating Republican Donald Trump. (Reuters)

In a way, this was expected. Clinton backers in 2008, after all, eventually came around to Barack Obama's candidacy and overwhelmingly supported him in the general election. We've used this as our baseline in comparing how quickly Sanders supporters might come around to Clinton in 2016. But here's the thing: It took them a while. In June 2008, 20 percent of Clinton backers said they'd go for John McCain. In July, it was 22 percent, then 18 percent in August and 19 percent in September. It finally dropped to 14 percent in October.

It took Hillary supporters a while to move to Obama, but come November they did, and in huge numbers. However, almost all Bernie supporters are already with Hillary NOW. That is very bad news for Trump. And good news for all of us.

Well, it's June 2016, and that same figure this time is down to 8 percent already. What's more, the 81 percent of Sanders backers who are now behind Clinton is a higher number than in any poll of 2008 Clinton backers who rallied to Obama. The high that year was 74 percent, in October.

81% of Bernie Sanders backers are now behind Hillary. 81%, folks.

Of course, except on trade isolationism, there was very little overlap between the typical Sanders supporter and the Trump agenda:

Indeed, as a Pew poll last week showed, Sanders supporters were more anti-Republican Party than Clinton backers. About 7 in 10 of them, in fact, said the Republican Party makes them "afraid" — vs. 55 percent of Clinton supporters.

This is awesome. 81% of Bernie backers are now Hillary backers. Together Bernie and Hillary can get that number even higher. I think this is going to be a banner year for the Democratic Party.