Sanders has a bigger lead over trump than any of the other candidates. Man you say a lot of things that are just flat out wrong.
Factually incorrect. CNN poll, Wed Jan 22, Dems vs. Trump: Biden +9, Sanders +7.
Marquette, Jan 22, Biden +4, Sanders +1.
EPIC-MRA, Jan 15, Biden +6, Sanders +5.
IBD-TIPP, Jan 13, Biden +2, Sanders +1
Fox News, Jan 10, Biden +5, Sanders +4.
Detroit News, Jan 9, Biden +7, Sanders +4
Mason Dixon, Dec 31, Biden +2 vs. Trump, Trump +5 vs. Sanders
CNN, Dec 20, Biden +5, Sanders +4.
USA Today / Suffolk, Dec 17, Biden vs. Trump, Trump +3, Sanders vs. Trump, Trump +5
IBD-TIPP, Dec 16, Biden +5, Trump vs. Sanders, Trump +1
Fox News, Dec 15, Biden +7, Sanders +6
Marquette, Dec 12, Biden +1, Trump vs. Sanders, Trump +2
CNN, Dec 12, Biden vs. Trump, Trump +1, Sanders vs. Trump, Trump +7
And so on.
On the 3 pages of polls in aggregator site Real Clear Politics, I counted no fewer than 30 polls with similar results like the above. I could quote all 30 but the ones I've quoted above suffice (if I continue, you'll say it's an essay, LOL).
In all 30, Biden is either beating Trump by larger margins than Sanders, or beating Trump while Sanders loses to him, or losing to Trump by smaller margins than Sanders loses to Trump.
You were saying? Come again? Who is saying flat wrong things???
Sure, you can find a couple of polls with different results... but the OVERWHELMING MAJORITY, really VAST MAJORITY show Biden doing better than Sanders against Trump.
That's why you need to look at AGGREGATOR sites, not just a couple of polls that show you what you want to see.
Do you get it now, or are there too many words above for your short attention span?