Question: Name the republican steve sauerberg where dates administered September 15-September 18, 2008
SQL: SELECT "Republican: Steve Sauerberg" FROM "1-16751596-2" WHERE "Dates administered" = 'September 15-September 18, 2008';

Question: Name the republican steve sauerberg for August 12, 2008
SQL: SELECT "Republican: Steve Sauerberg" FROM "1-16751596-2" WHERE "Dates administered" = 'August 12, 2008';

Question: Name the poll source for July 12, 2008
SQL: SELECT "Poll Source" FROM "1-16751596-2" WHERE "Dates administered" = 'July 12, 2008';