IMHO, a better way to get conservative senators would be to repeal the 17th Amendment and go back to appointment by state legislatures. Somehow, I can't imagine even the most liberal state legislature appointing a$$hats like the Swimmer or the Hildabeast to represent their state's interests in Washington.
I am no fan of the 17th Amendment, but the Republicans have captured Senate seats in the South well before the state legislatures went Republican. For example, by 1993, the GOP held both U.S. Senate seats in Texas, although the party did not obtain control of both houses of the legislature until 2002.