Argument: Open primaries lower turnout by eliminating clear choices
"Why open primaries are a really bad idea." Next Left. May 26th, 2009: "here is good evidence that one of the reasons for things like falling electoral turnout in contemporary democracies is precisely that parties do not offer voters sufficient choice. The open primary, ostensibly a way of putting the political system more in touch with the voter, would be likely to accentuate this in the long-term and so actually risks worsening lack of interest and engagement in the political system."