There's a cause and there's an effect. This is like saying that Harvard being full of privileged white children is an indication that only privileged white children have what it takes to get into Harvard. Here's the Des Moines Register: In 2016, Clinton got 49.9% of the delegates while Sanders got 49.6... ...in a system that loves math so much they're using remainders and shit. You mention the '92 election: NONE OF THE ABOVE CAME IN SECOND. So it all pretty much comes down to a bunch of "see if the witch floats" bullshit amongst a bunch of white-ass 'boomers who, for reasons utterly unassociated with democracy, get to decide that I can't vote for Howard Dean.The Iowa caucuses have a poor record of picking presidents, but they play the important role of winnowing the field.