Rcp is a joke. Reuters is an actual news group.
RCP is an average of the scientific polling used by actual news organizations and a few major universities. You do realize that don’t you? RCP selects the polls that have the most reliable track records and combines them for the average. Polls that consistently show they are outliers are removed from the RCP average.
The RCP average combines McClatchy/Marist, Fox, Quinnipiac, NBC/WSJ, IBD/TIPP, CBS/NY Times, PPP, Bloomberg, USAT/Suffolk, ABC/Wash Post, Reason-Rupe.
Online polls are excluded which is why you don’t see Harris, Zogby, YouGov or this Reuters poll you seem to wedded to.