Constitutional amendments must be ratified by the votes of 3/4 of the State Legislatures. There is no requirement for a plebiscite, or vote of the people. Each State Legislature can, if it chooses, base its decision on a popular vote, but I'm not aware that any do.
senate majority leader
president of the state senate
an interest group
plurality is the word .
Added: It is the local town or municipality.
West Southwest or Southwest depending on the location.
Senate district 22 is NW of Oklahoma City, while Senate district 38 is on the SW border with Texas.