Question: What district was a Republican first elected in 2000?
SQL: SELECT "District" FROM "2-1805191-26" WHERE "First elected" = 2000.0 AND "Party" = 'Republican';

Question: In what district was incumbent Russ Carnahan elected after 2000?
SQL: SELECT "District" FROM "2-1805191-26" WHERE "First elected" > 2000.0 AND "Incumbent" = 'Russ Carnahan';