General Discussion
In reply to the discussion: As Tensions Simmer, Poll Shows Majority of Democrats Want Bold Leftward Shift [View all]lapucelle
(20,983 posts)from the Harvard Harris poll as reliable and valid. This only begins to describe its problems as an accurate measure of public opinion:
https://www.democraticunderground.com/10029751135#post220
I worked for Katie McGinty in PA. Because we can never know what would have happened in apocryphal elections, speculation concerning who would have won the election had the Democratic nominee been someone more to the left or more conservative than the person who actually won the primary is more a function of personal bias than anything else. Since the Sanders' endorsement did not secure a victory, I don't see why having a candidate farther to the left of a hard-core liberal like Katie would have resulted in victory.
As for any claims that Kate McGinty is "conservative", On The Issues.org rated her a "hard-core liberal" based on her policy positions.

Here is an explanation of the metrics for On The Issues.org's political philosophy determination standards.
http://www.ontheissues.org/VoteMatch/candidate_map.asp?a1=1&a2=1&a3=1&a4=3&a9=1&a16=5&a10=5&a5=5&a7=4&a8=2&a14=1&a15=2&a17=4&a19=4&a18=1&a6=1&a20=1&a11=2&a12=4&a13=2&i1=1&i2=1&i3=1&i4=1&p=78&e=18&t=21