Table: us_senate_poll_2008_2
Columns: poll_source
dates_administered
democrat_mark_begich
republican_ted_stevens
lead_maragin

Question: What was Mark Begich polling on October 6, 2008?
SQL: SELECT "democrat_mark_begich" FROM us_senate_poll_2008_2 WHERE "dates_administered" = 'October 6, 2008'

Question: When the poll source is research 2000/daily kos, what is the total number of dates administered? 
SQL: SELECT COUNT("dates_administered") FROM us_senate_poll_2008_2 WHERE "poll_source" = 'Research 2000/Daily Kos'

Question: On July 17, 2008, what was the total number of lead maragin? 
SQL: SELECT COUNT("lead_maragin") FROM us_senate_poll_2008_2 WHERE "dates_administered" = 'July 17, 2008'