I was reading about the Seventeenth Amendment and had a question about one of the sentences in its opening paragraph:
The Senate of the United States shall be composed of two Senators from each State, elected by the people thereof, for six years; and each Senator shall have one vote. The electors in each State shall have the qualifications requisite for electors of the most numerous branch of the State legislatures.
What does this phrase mean? Is this referring to Electoral College electors? To the voters in the state casting votes? To the officials up for election? I've done some searching online about this and haven't really found anything on the subject.