Any Non-Christians running?

[Stand With Israel. Crush Hamas]

I think there's a good chance Sanders comes closer to the nomination than any non-Christian ever has. I doubt he'll actually win it, though.

The small but incredibly pathological group of anti-semites in this country would go absolutely nuts if a Jewish person won the nomination of either party. It would be a year of Rothschild conspiracies and talks of loyalty oaths.

The Republicans are basically devoid of non-Christian office-holders at this point, barring a come-from-behind win for Lee Zeldin. Democrats have a number of Jewish elected officials who could run, but probably not in 2016. Brian Schatz immediately comes to mind as someone who may have his eye on 2020/2024.

As for other religions, it won't happen this cycle, but Tulsi Gabbard would seem to be the only non-Christian/Jewish official in politics right now with national potential. Keith Ellison, Andre Carson, and Kristen Sinema aren't likely to move up from Congress, while Gabbard undoubtedly has her eye on Hirono's seat eventually.

[Stand With Israel. Crush Hamas]

Jewish politicians have had a real string of bad luck.  You have the candidates who lost reelection, Coleman, Feingold and Eric Cantor.  You have the candidates taken down by scandal, Weiner and Spitzer.  And, you have a freak accidents in the case of Wellstone and an attempted assassination in the case of Giffords.  If you're only 2% of the population, you can't clear your bench of elected officials like that.

And of course, there's Lieberman, who was the VP nominee of a man who could have had the nomination with a word, but had the misfortune of running just as the party tilted away from his style of Democrat. From winner of the popular vote for VP, to barely even a blip on the primary radar, to primaried out of the party within six years. Crazy.

There's still a really strong group of Jewish politicians in office, but they tend to be older policy wonk types. Like, Chuck Schumer is one of the savviest and most accomplished politicians in the country right now, but he's not running any time soon.

[Stand With Israel. Crush Hamas]

So Sanders is a Jewish Atheist? He has no chance though.

I think he's secular/non-observant, but not a declared atheist.