Why would any delegates even be registered as independents? You need to be a registered Democrat to vote in the caucuses in the first place.
They're just dumb. Most of the 64 weren't even real delegates -- they "couldn't find their address or phone number in the list of registered delegates" or something like that... what I want to know is why Bernie would have had as many or more delegates than Hillary if some part of the 64 had been allowed in. Did some of Hillary's people just not show up?
It's presumably due to the mess at the Clark County convention last month, where indeed more Sanders than Hillary people showed up.
The number of delegates at these conventions is pretty insane; the number of registered voters per delegate (which is written into state law, I believe) is ridiculously low, so there are always going to be people who don't show up. And when they do, the conventions are almost guaranteed to be a mess.
