Funny how the coalition you tout only moves right.

Probably because there is this widespread view on the left that is a combination of not understanding how our government/elections work and not understanding political coalitions as demonstrated by this thread. That and thinking that showing up once a year (let's be real, once every 4 years) to make a token gesture without doing the 364 days of fighting is enough. Hard to get what you want without participating and/or even understanding the situation.