hen presidential candidates turn to data crunchers at Rocket Fuel in Silicon Valley for help finding voters who want tougher immigration enforcement, the firm comes up with a surprisingly specific answer: Chevy truck drivers who like Starbucks.

The data modeling from Rocket Fuel shows that this group leans against a path to citizenship for workers in the U.S. illegally. And these particular voters have become surprisingly easy – some argue creepily so – for campaigns to find and approach. So have consumers of frozen vegetables, who are more likely to oppose abortion. As have people curious about diabetes, a group that tends to settle on a candidate early in the race.