In one major poll, Bernie Sanders is now leading Hillary Clinton nationally. In most others, he’s not far behind from the former Secretary of State. Vermont’s Senator already has an “edge over Clinton in matchups with GOP opponents,” dispelling Clinton’s electability myth. In an average of national polls, Bernie Sanders is less  than eight points from Hillary Clinton, after being over 50 points behind in 2015. In addition, there’s only one person capable of challenging a Republican in 2016 without James Comey declaring national security was jeopardized by a private server.
Bernie Sanders is the only Democratic candidate capable of winning the White House in 2016. Please name the last person to win the presidency alongside an ongoing FBI investigation, negative favorability ratings, questions about character linked to continual flip-flops, a dubious money trail of donors, and the genuine contempt of the rival political party. In reality, Clinton is a liability to Democrats, and certainly not the person capable of ensuring liberal Supreme Court nominees and President Obama’s legacy.
The precious and all-knowing polls already show Bernie Sanders defeating Republicans in a general election and Robert Reich has already explained why Sanders can easily win the presidency. In a Huffington Post piece titled “6 Responses to Bernie Skeptic,” Reich debunks the trusted myth of Clinton supporters and Republicans:

“He’d never beat Trump or Cruz in a general election.”
Wrong. According to the latest polls, Bernie is the strongest Democratic candidate in the general election, defeating both Donald Trump and Ted Cruz in hypothetical matchups. (The latest RealClear Politics averages of all polls shows Bernie beating Trump by a larger margin than Hillary beats Trump, and Bernie beating Cruz while Hillary loses to Cruz.)
“America would never elect a socialist.”
P-l-e-a-s-e. America’s most successful and beloved government programs are social insurance – Social Security and Medicare. A highway is a shared social expenditure, as is the military and public parks and schools. The problem is we now have excessive socialism for the rich (bailouts of Wall Street, subsidies for Big Ag and Big Pharma, monopolization by cable companies and giant health insurers, giant tax-deductible CEO pay packages) – all of which Bernie wants to end or prevent.

As Reich points out in his article, America is already a nation of Democratic-Socialists, but many of us (Democrats and Republicans) simply uphold “excessive socialism for the rich.”
Bernie Sanders, unlike Clinton, defeats Donald Trump in a landslide of  “epic proportions” in a general election and is the antithesis of a Republican. If you don’t believe me, then watch my friend Brian Hanley’s animated rap videos about Bernie Sanders demolishing Donald Trump.
Most importantly, and something the naysayers should learn, is that Bernie Sanders does better than Clinton against the GOP in a general election.
In addition, American voters don’t trust Hillary Clinton. At what point will critics of Bernie Sanders realize that American voters will never vote for a candidate they don’t trust and don’t like? In October of 2015, I explained in the following YouTube segment why Clinton is unelectable, and in another segment why Clinton must always evolve on key issues.
53.8% of all American voters have an “unfavorable” view of Hillary Clinton.
67% of American voters find Hillary Clinton “not honest and trustworthy,” compared with 59% for Donald Trump. Yes, more people trust Donald Trump.
After all, it’s difficult to trust a politician who completely fabricated a story about being fired upon by snipers. Like POLITIFACT states, “it’s hard to understand how she could err on something so significant as whether she did or didn’t dodge sniper bullets.”
71% of men and 64% of women find Clinton “not honest and trustworthy.”