What is the lowest First Elected, when Party is "Republican", and when District is "Minnesota 1"?
CREATE TABLE "minnesota" (
  "district" text,
  "incumbent" text,
  "party" text,
  "first_elected" real,
  "results" text
);
SELECT MIN("first_elected") FROM "minnesota" WHERE "party"='republican' AND "district"='minnesota 1';