The first time I heard about Howard Dean in 2003, I googled him and found his campaign website. I went right to the issues section and was blown away! This was not the usual careful political parsing I was used to. The positions I saw were clear and firm. They not only presented a stand, but an explanation. I felt respected as a citizen and made my first-ever political donation right there and then. The first of many.
This year, I have searched in vain for anything similar. Until recently, the Clinton site had no issues section at all. None. Only the Kucinich site had anything approaching what I saw on Dean's site in 2003. I was offended on several sites (John McCain was the worst with the big black page) to be presented with a big splash screen asking for donations before I'd even entered the site. And even more offended when I saw what content-free zones the websites were.
I know about the votes you mention. But only because I did my homework--not because candidates published their stands on these controversial issues.
You will probably not be surprised to hear that, this year, I have yet to decide on a candidate. I have not made any donations. I am not organizing and working, or planning to travel to multiple states to support anybody--all of which I did in 2003/2004. At the most basic level, it's because none of them have done me the courtesy to tell me who I'd be supporting.

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Political Base
Political Base, which I wrote about this morning, is doing a good job of comparisons, especially the issues section, which offers a really cool way to compare the candidates.