The polls make it obvious it's all name recognition. In which case Matthews's position in the primary looks very precarious indeed compared with his outperformance of the other Democrats in the general.
Out of curiosity, who do the Kos people like?
The comments people keep disparagingly calling Matthews "Tweety"(?), and one outright says he doesn't like him, with no disagreeing comments. Another complains that "Tweeter" is "injecting himself into PA politics."
The comments about the other two are basically positive, but that they're little-known outside of Philly. Looks like the Kossacks lean toward "not Matthews." Not sure why.