I took that and
it said my positions matched Sanders' at 98%, Clinton's at 82%. The best Republican match for me was Chris Christie at 44%, and it gets comically low beyond that.
The campaign events for Sanders remind me of the ones for Ralph Nader in 2000, though Sanders may be drawing even bigger crowds. Nader came to Target Center and filled the place up pretty well even though people had to pay $7 to get in. My memory was that it was probably 60-80% full, which would be 12,000 to 16,000 people since the rally used the "concert" seating arrangement, though reports after the fact tended to round down the numbers. I recall an initial news article reporting an attendance of 12,000 got regurgitated through another outlet saying "more than 11,000", and then to another outlet that said "about 10,000", so it was hard to come away from that without believing the news media just didn't want him around.
The Sanders campaign is going to have a lot of the same trouble with reporters not taking him seriously, but he potentially has a gigantic advantage over Nader's campaign because he's running for the Democratic nomination rather than representing a third party (which was the Green Party in Nader's case). Everything is set up for a two-party system -- in places like Minnesota, it isn't hard to get a third-party candidate on the ballot, but there are other states where it's virtually impossible. The debate system is geared toward only allowing two parties. The Electoral College system makes it ridiculously difficult to have votes for third parties count at all (it probably does a disservice to the second party too).
The machine within the Democratic Party is just as difficult to defeat, though I think the nomination of the yawn candidate Al Gore in 2000 followed by mega-yawn candidate John Kerry in 2004 really proved to many on the political left that the Democratic machine is (or at least was) inherently broken. Even the nomination of Obama in 2008 was a compromise, in my view, but they both had compelling backstories, and the optics of the horse race between someone who was potentially the first female president vs. the first black president were too enticing for the news media to bother covering anyone else in depth.
But of course the party machine became what it was because of landslide defeats with McGovern in 1972 (who
beat Hubert Humphrey for the nomination) and Mondale in '84. Nobody wanted that to happen again.
My positions seem to put me out on the far left, but I don't really think of myself as a left-wing loon -- To the best of my ability, my positions are based on the facts as I see them. I try to be accurate in my viewpoints, though I don't always succeed. I'd rather see an election that elects the person who has the most true ideas rather than the most liberal or conservative ones. As Stephen Colbert used to say, "Reality has a well-known liberal bias."