Some other candidates would be able to continue after this, but since the media hates Sanders, they'll constantly portray him as near death. Probably it will hurt his support enough to kill his inertia and force him to drop out after he performs poorly in the first few states.
According to the latest Morning Consult polling, Sanders supporters say that their second choice is:
- 30% Biden
- 28% Warren
- 6% Harris
If you assume that Sanders drops out now, go based on the above numbers along with the current RCP average, and give one-tenth of Sanders' remaining support to candidates not listed in the Morning Consult poll, you get adjusted numbers of:
- Biden 26.1 -> 31.1
- Warren 24.4 -> 29.1
- Buttigieg 5.6 -> 6.2
- Harris 4.7 -> 5.7
- Yang 3.3 -> 3.9
This (incredibly rough/unscientific analysis) makes it look good for Biden and to a slightly lesser extent Warren, but it really solidifies it into a 2-person race.
I would've really liked Sanders vs Trump because it's win-win in some ways: compared to previous presidents Trump is above average in most areas, while Sanders is excellent on foreign policy and civil liberties and terrible on policies that a president is more limited in affecting. Now I probably have to hope for Trump beating Biden or Warren.
In Trump vs Biden, I think Trump would probably win, but it wouldn't be a sure thing. President Biden would be like a mix between Obama and Bush. Biden himself is very authoritarian and pro-intervention, but he would probably appoint some Obama people to his administration, which might improve things somewhat on average. On the plus side, he is definitely not anti-capitalist.
In Trump vs Warren, Warren would have a very low chance of winning, but it'd be high stakes because Warren is really terrible. Warren is a horrible fusion of authoritarianism, interventionism, anti-capitalism, and corporatism, and her victory would embolden progressives while also giving them an opportunity to say, "Warren is destroying the country only because she's not progressive enough: she's no Bernie!". On the plus side, if she loses (which is the most likely outcome), it might diminish AOC-type progressivism in the Democratic party for a while.
I guess Bernie is most likely spewing the same stuff that Trump said about foreign policy - which was the idea that the US was in too many foreign ways and the troops should come home.
I don't know much about his foreign policy, though I've heard its pretty much what Trump had spoken about during the campaign trail.
I guess we'll see.