Thanks for the post. I have got a lot out of your excellent and nuanced accounts of what difference these changes do and don’t make.

To others, I really recommend the longer piece on Mark’s own blog.

Apart from the local/national point, I think a central point about what is or isn’t changing is that online communication has already changed debate within each of the parties and seems likely to do so in potentially transformative ways, as well as creating new opportunities to argue and engage between those within parties and broader non-party politically engaged audiences (like LC). But it is naturally going to do much less (and more slowly) to transform political communication with the electorate, and especially at a national as opposed to local level.