CREATE TABLE table_22108 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Results" CLOB, "Candidates" CLOB)

In which district is the first elected 2000?
SELECT "District" FROM table_22108 WHERE "First elected" = '2000'
SELECT "District" FROM "table_22108" WHERE "First elected" = '2000'