Table: gubernatorial_polls_2008
Columns: poll_source
dates_administered
democrat_jay_nixon
republican_kenny_hulshof
lead_margin

Question: Who's the poll source that claimed the Lead Margin was 17 and the Democrat: Jay Nixon had 54% of the votes?
SQL: SELECT "poll_source" FROM gubernatorial_polls_2008 WHERE "democrat_jay_nixon" = '54%' AND "lead_margin" = '17'

Question: What poll source claimed that Republican: Kenny Hulshof had 43%?
SQL: SELECT "poll_source" FROM gubernatorial_polls_2008 WHERE "republican_kenny_hulshof" = '43%'

Question: How many different lead margins were stated in the poll administered on September 11, 2008?
SQL: SELECT COUNT("lead_margin") FROM gubernatorial_polls_2008 WHERE "dates_administered" = 'September 11, 2008'

Question: What percentage was claimed that Republican: Kenny Hulshof got in the poll that also claimed Democrat: Jay Nixon got 48%?
SQL: SELECT "republican_kenny_hulshof" FROM gubernatorial_polls_2008 WHERE "democrat_jay_nixon" = '48%'