The NY special election race had nothing to do with Trump - and even the Leftist intelligentsia recognizes this.
In fact, the Left readily concedes NY could be a major problem this November.
This is from a Leftist at Slate magazine:
Tom Suozzi’s win won't be easily replicable.
news.yahoo.com
And the NY Times is ambiguous at best:
Latest Breaking News, U.S. and World Politics, Crime, Business, Science, Technology, Autos, Entertainment, Culture, Movie, Music, Sports.
dnyuz.com
But hey, believe what you want.
We'll all find out soon enough.