“
Sixty years ago, Austin Ranney, an eminent political scientist, wrote a prophetic dissent to a famous report by an American Political Science Association committee entitled “Toward a More Responsible Two-Party System.”4 The report, by prominent political scientists frustrated with the role of conservative Southern Democrats in blocking civil rights and other social policy, issued a clarion call for more ideologically coherent, internally unified, and adversarial parties in the fashion of a Westminster-style parliamentary democracy like Britain or Canada. Ranney powerfully argued that such parties would be a disaster within the American constitutional system, given our separation of powers, separately elected institutions, and constraints on majority rule that favor cross-party coalitions and compromise. Time has proven Ranney dead right—we now have the kinds of parties the report desired, and it is disastrous.
”
”
Thomas E. Mann (It's Even Worse Than It Looks: How the American Constitutional System Collided with the New Politics of Extremism)