Michael Barone looks at the primary election results so far in search of a common thread for Trump victories - and defeats.
Putnam reports that social connectedness is highest in states with large Scandinavian- and German-American populations and in Utah. It's lowest in -- no surprise -- Nevada, one of Trump's best states.
In the 13 states highest in social connectedness, Trump has gotten just 21 to 35 percent in primaries and caucuses. In the 11 states lowest in social connectedness (except for Cruz's Texas), his percentages ranged from 33 to 47 percent.
A few more months of connecting the dots to get a Republican nominee.