Table: us_senate_poll_2008
Columns: poll_source
dates_administered
democrat_john_kerry
republican_jeff_beatty
lead_margin

Question: what is the maximum lead margin on august 5, 2008?
SQL: SELECT MAX("lead_margin") FROM us_senate_poll_2008 WHERE "dates_administered" = 'August 5, 2008'

Question: what is hte date where republican jeaff beatty is 34%?
SQL: SELECT "dates_administered" FROM us_senate_poll_2008 WHERE "republican_jeff_beatty" = '34%'

Question: what are the dates where democrat john kerry is 63% and poll source is rasmussen reports?
SQL: SELECT "dates_administered" FROM us_senate_poll_2008 WHERE "democrat_john_kerry" = '63%' AND "poll_source" = 'Rasmussen Reports'

Question: what is the percentage for john kerry and dates administered is april 22, 2008?
SQL: SELECT "democrat_john_kerry" FROM us_senate_poll_2008 WHERE "dates_administered" = 'April 22, 2008'