user: ### NOW ANSWER:
Question: WHAT DATE DID JOE SESTAK HAVE 46% WITH ± 3.0% MARGIN OF ERROR?
Columns: ['Poll source', 'Date(s) administered', 'Sample size', 'Margin of error', 'Joe Sestak (D)', 'Pat Toomey (R)', 'Other', 'Undecided']
Types: ['text', 'text', 'real', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Research 2000 (report)', 'May 7, 2009', 600.0, '± 4.0%', '37%', '32%', '––', '––']
SQL:

assistant: SELECT "Date(s) administered" FROM "Table" WHERE "Joe Sestak (D)" = '46%' AND "Margin of error" = '± 3.0%';