I am referring to the one at polling. reuters.com/
Many of us had a suspicion that pollsters abuse sample distributions by oversampling Democrats. However, I decided to take it a bit further and analyze Reuters data itself. Now getting the sample distribution wasn't straight-forward, they make it hard to compare. Doing it manually will discourage anyone from digging. However, I got the data which you can find here pastebin.com
Anyway as you can see, at one point there were 38.55% more Democrats than Republicans in their sample back in early August. What's very interesting is the trend from 9-18 to 9-26, you can see that it goes from there being less than 5% more Democrats to there being over 20% more Democrats. What's also interesting is that post was right on the money.
Reuters has it's own Api which you can access through these URLs.
Likely Voters
polling. reuters.com/api/1.4/polling/json/mean?dimension=TM651Y15_DS_13×eries=day×eries_columns=bucket-id,bucket-label,low,mean,high,count,weight,count-sum,weight-sum&filter=LIKELY:1&daterange=20160601-20161002&account=trpoll&auth=1eeb6846e5f8be86
Likely Democrat Voters
polling. reuters.com/api/1.4/polling/json/mean?dimension=TM651Y15_DS_13×eries=day×eries_columns=bucket-id,bucket-label,low,mean,high,count,weight,count-sum,weight-sum&filter=LIKELY:1&filter=PARTY_ID_:1&daterange=20160601-20161007&account=trpoll&auth=1eeb6846e5f8be86
Likely Republican Voters
polling. reuters.com/api/1.4/polling/json/mean?dimension=TM651Y15_DS_13×eries=day×eries_columns=bucket-id,bucket-label,low,mean,high,count,weight,count-sum,weight-sum&filter=LIKELY:1&filter=PARTY_ID_:2&daterange=20160601-20161009&account=trpoll&auth=1eeb6846e5f8be86
I manually copied the json output and then used javascript to deduce the sample distributions. You can find it at pastebin.com