Perhaps if the far left and hard right didn't dominate primaries (many reasons for this), we could have less extreme candidates in November. But it is what it is until we start having civil conversations with our friends, family, neighbors, and community. We could be having conversations about how we improve our democracy.
You comment lends to being part of the problem. Please stop demeaning everyone with blanket statements.
As an independent volunteering with Indivisible, my main effort has been to moderate the members on the far left.