Fair enough. The Green Party
recently declared themselves to be anti-capitalist, but they're a joke. Socialism is also pretty far down on their priority list.
Anti-capitalist sentiment is absolutely on the rise in the United States, as America's youth groan under the stressors of fiscal liberalism and see few of the benefits their parents and grandparents enjoyed. Despite only being a particularly labor-minded social democrat, Bernie Sander's use of the word socialist is radical and has altered our political climate.
The Democrats are going to see increasing challenges from the left going forward. I'm not sure how the party will respond to this.