This is all part of the effort to make everything Trump does or says “abnormal” or “controversial” no matter if the dems themselves have said or done the same thing. Data mining may sound like some sort of modern day invention, but advertising started long ago, and it has always been based on profiling potential customers, gathering stats on what works and what doesn’t. I would have been disappointed to find out that the Trump campaign didn’t use data mining.
Wouldn’t Nielsen ratings be classed as early form of datamining