The name of survey is CNBC All-America Economic Survey. The questions asked are about candidates relative to economy.Reuters-Ipsos is one of the worst.
Always over samples Dems.
Rasmussen, much better weighted, has Trump up nationally by 5.
You're also wrong about the CNBC poll.
It IS in fact a national popular vote poll, which includes the economy as a cross tab.
Polls of the most likely voters gives you the most accurate results if the election was held today. It gives you a better picture of who is ahead today because it only includes likely voters today.