PPP: White 49, Shami 19
PPP (D), 2/4-2/7, 400 likely Dem primary voters
Margin of Error
I'd caution that Dem primary polling in Texas has not been very reliable in the last decade. The sample here was only 32% Hispanic, which I assume is a signficant underweighting. For example, they had 2006 Lt Guv nominee Alvarado at 5% and Aguado at 2%. I'd be willing to bet that they poll over 7% cumulatively.
Edit: My expectation is that they poll at multiples of 7% cumulatively, just to be clearer.
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