Wiktionary
politiquera
n. (context US politics English) One who is paid by an election campaign to issue fliers to householders and encourage them to go and vote for a particular candidate.
Wikipedia
Politiquera
A politiquera in the United States is an individual who is paid for by an election campaign to knock on doors to issue fliers and encourage people to get out and vote in favour of the candidate. Candidates who generally lack the grass root volunteers who normally do this job, resort to politiqueras to achieve the goal. Use of politiqueras in southern regions of Texas during the democratic primary on March 4, 2008 by Hillary Clinton campaign is one such example.