Sanders will have to claw and bite his way for every vote past 40%.
What makes you say that? He's been within 20 in every recent poll, an 11-point loss would imply that he'd get about 44% of the vote.
If in politics, dumping tens of millions of dollars, unleashing an army of free campaign labor, campaigning personally constantly for two weeks, forcing the scheduling of a debate, and getting thousands of people out to rallies just to get from 40% to 44% of the vote isn't clawing and biting for every vote, I don't know what is.