National Association of Nonpartisan Reformers
From the NANR website:
The National Association of Nonpartisan Reformers is a collection of individuals and organizations dedicated to fostering a government that is representative of and responsive to the people, and to advancing reforms and causes that increase competition, participation, and accountability in our political system.
We recognize that the remedy to our unrepresentative and unresponsive government is to credibly challenge the institutionalized advantages that transfer control of the electoral process from the people to the leadership of the Democratic and Republican parties, and we resolve to mount that challenge.
In our common pursuit of this right and essential objective, we have established an association of nonpartisan, reform-oriented organizations and individuals that can facilitate shared resources, establish common objectives, and promote general efforts to provide more choice to voters and better representation to every citizen of the United States regardless of their party affiliation or non-affiliation.