Table schema:
CREATE TABLE table_name_72 (sample_size INTEGER, date VARCHAR, margin_of_error VARCHAR)

Question: What was the sample size for the poll from Nov 9-11, 2007 with a margin of error less than 4.3?
SQL: SELECT MAX(sample_size) FROM table_name_72 WHERE date = "nov 9-11, 2007" AND margin_of_error < 4.3