We've spent some time looking at the bizarrely skewed Reuters-Ipsos general election polling that has, over the last couple of months, included survey samples that are often more than 50% self-identified Democrats, about one-third Republican, and the residual being independents or third-party backers.
The latest R-I poll is a staggering 56% Democrat, 39% Republican, and 5% other. Despite an almost 20 point advantage in partisan affiliation, though, Hillary is beating Trump by just a hair, 41%-38%. In this latest iteration, which runs from July 18-22, Trump is getting 9% of Democrat support while Hillary is getting 8% of Republican support.
The last time Trump was this close to Hillary in R-I the sample was much more evenly distributed by partisan affiliation, at 45% Democrat and 42% Republican. If current polling included the same partisan distribution now as it did back in May it would show Trump crushing Hillary by something like 43%-32%.
Caveats about convention bounces should be taken into account, of course. That said, things are looking good for the Trump train.