Question: What kind of Obama that has a Source of Rasmussen Reports?
SQL: SELECT "Obama" FROM "2-15638491-1" WHERE "Source" = 'Rasmussen Reports';

Question: Which Source has a Undecided of 2%?
SQL: SELECT "Source" FROM "2-15638491-1" WHERE "Undecided" = '2%';

Question: What kind of Obama has a Undecided of 1%?
SQL: SELECT "Obama" FROM "2-15638491-1" WHERE "Undecided" = '1%';

Question: When has a Source of SurveyUSA and a Obama of 54%?
SQL: SELECT "Date" FROM "2-15638491-1" WHERE "Source" = 'SurveyUSA' AND "Obama" = '54%';

Question: When has a Source of Rasmussen Reports?
SQL: SELECT "Date" FROM "2-15638491-1" WHERE "Source" = 'Rasmussen Reports';

Question: Which Source has a Clinton of 39% and a Undecided of 7%?
SQL: SELECT "Source" FROM "2-15638491-1" WHERE "Clinton" = '39%' AND "Undecided" = '7%';