CNN/ORC Poll of Trump Speech Watchers
Overall Reaction to Trump's Speech
Very Positive 57%
Somewhat Positive 18%
Negative Effect 24%
In what direction will the policies proposed by Trump move the country?
Right Direction 73% (was 60% pre-speech)
Wrong Direction 24%
How did Trump's speech affect your vote?
More Likely 56%
Less Likely 10%
Not Much Effect 32%
Source: CNN on TV. No link yet, best I can tell.
Should be noted, they were undecided Republicans.
They didn't say that on TV. They only said it was a poll of speech watchers, which for an RNC is going to skew Republican.