Answer:
Plain folks
Step-by-step 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.