It really doesn't matter. This is taking place in the Congressional district of Shiela Jackson Lee. Anyone who knows politics knows that she will win her re-election (despite her blatant socialist philosophy). Her district is so Gerrymandered, shaped like a triskelion (that's a swastika with 3 arms instead of 4), to ensure she wins.
Last time she won the district with over 70% of the vote. The work of the NAACP at this polling station will have no, zero, zip, nada, zilch effect on national or local elections.