This is way more invasive than just sending a whole bunch of e-mails all the time:
WASHINGTON (AP) — Building upon its fundraising prowess, Mitt Romney's campaign began a secretive data-mining project this summer to trove through Americans' personal information — including their purchasing history and church attendance — to identify new and likely wealthy donors, The Associated Press has learned.
The project employs strategies similar to those the business world uses to influence the way Americans shop and think. Now they're being used to sway presidential elections. The same personal data consumers give away — often unwittingly when they swipe their credit cards or log into Facebook — is now being used by the people who might one day occupy the White House.
For Romney's data-mining project, which began as early as June, the Republican candidate quietly turned to a little-known but successful analytics firm that previously performed marketing work for a colleague tied to Bain & Co., the management-consulting firm that Romney once led.