How Bernie Sanders' Strategy Will Evolve Going Forward

An audacious Sanders said today that he was still in the race to win it.

Despite losing an additional four states on the east coast the night before, which rendered his chances of winning the nomination nearly mathematically impossible, the senator said he believed he would still win the majority of the pledged delegates and was staying in the race to win it.

Sanders briefly acknowledged that he was losing the race, but essentially posited that he was hoping for a miracle.

“I am very good in arithmetic and I can count delegates and we are behind today but you know what? Unusual things happen in politics,” he continued at his rally. "And with your help we are going to win the pledged delegates."

Sanders' Strategy Moving Forward

Sanders added that even if he did not win, his team would fight through the end and try to win to as many delegates as possible in order to put pressure on the party and Clinton.

One of the senator's grassroots backers, Democracy for America, echoed Sanders’ firm stance that the onus was on Clinton to unite the party under a more progressive agenda, saying in a statement that the question was “whether the Democratic establishment [was] going to bring our party together by embracing our fight for a political revolution or tell us to sit down, shut up and fall in line.”

So far, Clinton and her campaign have reminded voters and the press that in 2008 she unconditionally backed her opponent Barack Obama once the nomination was out of her grasp and they have urged Sanders to do the same. On the one hand, Clinton will likely not need Sanders’ delegates to put her over the threshold for the nomination -- a fact limiting his negotiating power at the convention and before -- but she will want voters from his wing of the party to remain engaged going into the fall.

A Concession of Ideas, Not Just Delegates

Sanders’ most ardent fans have not been surprised by their leader’s defiance. After all, the senator has been arguing all along that the country’s entire political system is fundamentally broken and platforms of the Democratic Party are too narrow. He has spoken since the beginning of building a movement, not just electing a candidate. To back Clinton now could look like a concession of ideas, not just delegates.

“It's not just about Bernie, It's about the mindset that Bernie has. He’s all about for the people not individual,” Mary Crow, 20, a student and Sanders’ fan said Tuesday night in at Sanders’ rally in Huntington, West Virginia. She had made matching shirts with her friend, Rapen Hall, that read “#BernieorBust #NeverHillary #NeverTrump.”

“I firmly believe that there will be people just like him in the future. I don't think it's over. Even if he doesn't win, it’s just beginning,” Hall continued. “I can't believe how many people turned up today.”

For Sanders, a political revolution means in large part more active civil engagement, and Sanders reiterated today that whether he is elected or not he wants to see voter turnout increase substantially across the country. By continuing his speaking tour and delivering addresses mostly on college campuses, Sanders can in theory continue to gin up support and enthusiasm around his issues, though it remains to be seen where or how he will ask his fans to specifically direct their efforts should his campaign officially end.

Sanders has just begun using his email list and fundraising machine to back local candidates whose agendas align with his. In last few weeks, he has sent fundraising emails in support of three congressional candidates in Nevada, Washington State and New York, perhaps a sign that more of this will come as well.

ABC News' Ryan Struyk contributed to this report.