America's dominant two-party system forces the political parties to be inclusive and erect big tents. Since their origins, the Democratic and Republican parties have been ideologically variegated to accommodate such a demographically diverse and geographically expansive nation. Yet, given the variety of views within the parties, which prevail and why?

In Engines of Change, Daniel DiSalvo provides the first full account of the role of national intra-party "factions" in American politics. Factions are party sub-units that have enough ideological consistency, organizational...

As workers in the private sector struggle with stagnant wages, disappearing benefits, and rising retirement ages, unionized public employees retire in their fifties with over $100,000 a year in pension and healthcare benefits. The unions defend tooth and nail the generous compensation packages and extensive job security measures they've won for their members. However, the costs they impose crowd out important government services on which the poor and the middle class rely. Attempts to rein in the unions, as in Wisconsin and New Jersey, have met with massive resistance. Yet as Daniel DiSalvo...