CNN made clear that their poll heavily skewed Republican because of who was watching the SOTU. Not sure about CBS but they limited to people watching (which is how it has been done in the age of extreme partisanship).
The CBS poll last night was very similar to the 2018 SOTU:
The CNN poll had some underlying negative data for Trump based on the baseline of “very positive” respondents (which has been dropping generally for years apparently):
Query whether this should be treated as / compared to a first speech to Congress, however?