SOS Clinton is better qualified to be president than anyone, including current, former, and now-serving politicians. Period. Her values more closely tune to the great unserved Middle than anyone else, though both Sanders and Warren warm the cockles of my old heart. Mitt is a moderately crazy Republican in-service to the 1%. Obama is a lame DINO in service to the 1%. So unless the ghost of LBJ possesses Obama, our Middle options are severely limited.
I'd love to be able to support a reasonable third party-- one that puts winning elections,and therefore ultimately obtaining the results you wanted to begin with, first, not taking immovable principled stands on every issue coming and going. Yes, take immovable positions on some things, like social security, the public option, equal pay and opportunity for all, and tax fairness. Do not take hard positions on every detail of every issue-- that leaves no room for compromise, which is the art of governing. I generally like The Coffee Party, though they seem more inclined to work within the Democratic Party (sidebar-- never let the GOP rename anything, especially your own political party) rather than running their own third party candidates.
The bottom line appears to be either to "Tea Party" the Democrats or support a third party, but is it possible to both at the same time? I think so, and that's the way I'll direct my energy. (For more discussion on this issue, see the comments in this post.