You are just as likely to hear the argument for the infiltration of the major parties from Rush Limbaugh as you are from Markos Moulitsas. The reason for this is quite simple. The likes of Markos Moulitsas and Rush Limbaugh share the self-same goal: ensuring the reproduction of the Democrat-Republican two-party state and duopoly system of government. The infiltration of the major parties by free thinking, independently-minded individuals and groups is not the means by which the major parties are reformed and resuscitated. Rather it is the means by which free-thinking, independently-minded individuals and groups are smothered and castrated by the entrenched interests represented by the ruling party establishment.
However, in an interesting post at The Daily Mush, Jim Hlavac takes the infiltration argument and puts it in the service of the political opposition to the dictatorship of the two-party state. He argues that the wide swath of Americans who are not represented by the "socialists and theocrats" in the Democratic and Republican parties should infiltrate the Libertarian party. Excerpt:
So us 65% or so in the middle are forced, by current election rules, to either vote for Republicans, which empowers the theocrats on that side, or the Democrats, which empowers the Socialists on that side. And because the two fringes have so successfully insinuated themselves into the party power structure, and because the election laws are rigged in the parties favor, then it becomes almost impossible to get any sort of reasonable practical stuff done. And instead, the two fringes work their magic on gaining more control over the government, the law, the public purse and over the lives of the people . . . .
The only other party structure that is up and running is the Libertarians. Technically even the third largest party in America. And it’s time to consider us rational people taking over the moribund thing with its lots of ballot access and make it truly about what America is about – leaving people alone to do what they want to, so long as they cause no harm, and believe as they want to, and otherwise do nothing except handle the violent criminals, and defense, and adjudication of natural disputes from the course of the people’s activities, and help the most truly unfortunate. . . .
So why not take over the Libertarian Party and stop arguing within the elitist two party power structure and start arguing with it as a third party? Now that would be audacious hope for change.