John, you make a good point regarding the “gridlock vote.”
As for the treatment that Boaz and Kirby give to national
security, they say that libertarians may move away from the
Republican Party “If terrorism is not as critical a decision point
in upcoming elections, or if support for Bush’s handling of
terrorism declines.” However, it should be pretty clear that
terrorism will be the dominant issue for the foreseeable
future, and even if support for Bush declines, libertarian hawks
will still gravitate toward the candidate who would be the best on
national security, so the economic/social libertarian swing voter
won’t really be “in play” anyway. Or, more accurately, less votes
will be “in play” than Boaz and Kirby suggest.