History of Recall
The following is an excellent and well-documented history of the Progressive movement in the United States. One of the legacies of that movement was the embrace by certain states of the recall process. Another was to make senators elected by the people, rather than chosen by the state legislatures.
That structural change to the Constitution, the 17th Amendment, cut the connection between the legislatures of the states who more closely represent the people, and the senators from that state who now tend to represent national interests rather than those of their state. It is this disconnect which drives the present interest in recall elections to remove senators who have abandoned the interests of "the people back home."