The urban sample is smaller than both the suburban and rural samples, judging by the subsample MoEs. Though I guess it's not clear if it's still smaller than the other two after weighting, as that info isn't given. But in terms of the raw number of people who responded to the poll, the "urban" sample is smaller than both suburban and rural.
Well, regardless of sample size though, wouldn't these stats imply a Clinton lead of 50 points nationally? (why aren't I up 50?!? jk)
https://ask.census.gov/faq.php?id=5000&faqId=5971It just doesn't seem to add up to me, but there has to be some explanation. Maybe Rural turnout is super high, Urban is low, and Suburban is in the middle? Idk...