Isn't this the same discussion from recently?
This is in the same vein thematically but substantially different both legally and technically. It applies to immigrants whether or not they are crossing borders, and it builds a permanent database of what they've found. Whether this is illegal or not depends on the nature of "what they've found" - it sounds like they're "just" going to be buying up the same data sources advertisers use, which is probably legal. (But terrifying.)