Table: us_senate_poll_2008_4
Columns: poll_source
dates_administered
democrat_carl_levin
republican_jack_hoogendyk
lead_margin

Question: How many times did Public Policy Polling under Republican: Jack Hoogendyk?
SQL: SELECT COUNT("republican_jack_hoogendyk") FROM us_senate_poll_2008_4 WHERE "poll_source" = 'Public Policy Polling'

Question: What poll source had an administered date on July 10, 2008?
SQL: SELECT "poll_source" FROM us_senate_poll_2008_4 WHERE "dates_administered" = 'July 10, 2008'

Question: What was the smallest lead margin when the source of polls came from Strategic Vision and Democrat Carl Levin had 57%?
SQL: SELECT MIN("lead_margin") FROM us_senate_poll_2008_4 WHERE "poll_source" = 'Strategic Vision' AND "democrat_carl_levin" = '57%'

Question: What was the poll source when Democrat Carl Levin had 54% and the lead margin was 28?
SQL: SELECT "poll_source" FROM us_senate_poll_2008_4 WHERE "democrat_carl_levin" = '54%' AND "lead_margin" = 28

Question: How many dates were recorder administered when poll were sourced from Strategic Vision  and the Republican Jack Hoogendyk had 29%?
SQL: SELECT COUNT("dates_administered") FROM us_senate_poll_2008_4 WHERE "poll_source" = 'Strategic Vision' AND "republican_jack_hoogendyk" = '29%'