CNN Smerconish August 31, 2019 13:05:00
Couldn't match obama's power. in bucks county, pennsylvania, didn't even win the state. so crowd size alone is not sufficient to win the white house. is it nevertheless a good yard stick? joining me now to discuss is douglas brinkley, a presidential historian, professor of history at rice university, author most recently of "american moonshot: john f. kennedy and the great space race." douglas, put this all in some historical context? >> well, at the beginning of the 20th century, william mckinley who was a two-term president he had what he called his front porch campaign. he would just sit in...