How many times did Saxby Chambliss have a lead margin of 21?
CREATE TABLE table_16751596_16 (republican VARCHAR, lead_margin VARCHAR)
SELECT COUNT(republican) AS :_saxby_chambliss FROM table_16751596_16 WHERE lead_margin = 21
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_16751596_16 (republican VARCHAR, lead_margin VARCHAR) Question: How many times did Saxby Chambliss have a lead margin of 21? [/INST] SELECT COUNT(republican) AS :_saxby_chambliss FROM table_16751596_16 WHERE lead_margin = 21 </s>