During the 2004 Presidential election, Senator John Kerry was often seen in a brown worker's jacket on his whirlwind campaign tours. This strategy to convey to the voters that the Senator was "just a regular person" is called by sociologists Alfred and Elizabeth Lee

Plain folks

Explanation:

Plain folks is a technique mentioned by sociologists Alfred and Elizabeth Lee as one of the seven basic techniques that are used to make propaganda in which the person appears as a normal person that understands the problems of the other people. The goal of this is to make people trust this person and agree with his/her ideas. According to this, the answer is that this strategy to convey to the voters that the Senator was "just a regular person" is called plain folks by sociologists Alfred and Elizabeth Lee.

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