I, too, have seriously considered renouncing my membership in the Dem Party. Then I read this. Maybe it's too soon? But I feel like a 6 year old announcing they are running away from home to their parents. They ask, "Where will you go?." Oh, right, our "first past the post" system isn't kind to 3rd parties. Anyway, consider:

Fellow American-Social Democrats, Rooseveltian Progressives, and blue-collar laborites. I beseech you to remain within the Democratic Party as a new crop of progressive populists — belonging to Bernie Sanders' progressive-populist wing of the Democratic Party. We now possess the political-clout needed to challenge the Clintonian-Neoliberal orthodoxy and Neo-classical intelligentsia — our new coalition must not fall victim to disarray due to a mass exodus from the Democratic Party.

Please, take into consideration our unprecedented accomplishments with Sanders' Presidential campaign:
✪ 8 million individual contributions, averaging $27 per-donation
✪ $207.7 million raised, 99.98% from campaign donations
✪ 47% rank-and-file Democrats prefer Sanders (46% Clinton)
✪ 42.68% of the popular vote (source: The Green Papers)

A political transformation of unusual speed and scope is taking place in the United States; never before seen in the history of American electoral politics. Its most momentous feature is the emergence of a new reigning socio-economic philosophy of Social Democracy — akin to mid 20ᵗʰ century New Deal liberalism.

Please understand that the Democratic Party has experienced shifting Party coalitions for generations. Shifting partisan alliances invokes a common observation about social change. Broad sectors of the working and lower-middle classes, will no longer hesitate to make their unhappiness known. Bill Clinton's New Democrat coalition is unraveling, and you're witnessing the ascent of Sanders' Social-Democrat coalition.

The true basis of Sanders’ strength has been largely overlooked: He gives voice to a set of policy ideas that lie closer to the hearts of most Democratic voters—and especially the Democratic voters of the future—than Clinton’s do.That’s why the grassroots-progressive revolution won’t be quelled for long. This is as much a demographic certainty as a political one.

In one last stand, we have to strike fear into the hearts of the beltway Democratic Party leaders attending the Democratic National Convention in Philadelphia, Pennsylvania. We'll need hundreds of thousands demonstrating the power of grassroots mass-politics; the power of this mobilization will be measured in the size of the crowds outside of the Wells Fargo Center July 25ᵗʰ-28ᵗʰ.
Please, I implore you to be patient and allow Bernie Sanders to make his case at the convention.

The struggle continues, for political action starts with civil-unrest as an expression of democratic upsurge, and ends with voting as an expression of civic engagement.