The timing of media polling is also well beyond predictable. To generate news-worthy headlines they always push polling results around key dates; in this example on the eve of the first general election presidential debate.
The most current national survey of party affiliation shows Democrat party registration is D+4 –SEE HERE– nationally. However, for their needs, ABC/WaPo use D+10:
However, the good news is: even with that ridiculous +10 skew ABC/WaPo can only manage a 2 point Clinton lead: 46/44