For those like myself and others who are NOT familiar with political campaigns, here is some info on Microtargetting:
Microtargeting is the use by political parties and election campaigns of direct marketing datamining techniques that involve predictive market segmentation (aka cluster analysis). It is used by United States Republican and Democratic political parties and candidates to track individual voters and identify potential supporters. The term "microtargeting" was coined in 2002 by political consultant Alexander P. Gage.
They then use various means of communication—direct mail, phone calls, home visits, television, radio, web advertising, email, text messaging, etc.—to communicate with voters, crafting messages to build support for fundraising, campaign events, volunteering, and eventually to turn them out to the polls on election day. Microtargeting's tactics rely on transmitting a tailored message to a subgroup of the electorate on the basis of unique information about that subgroup.