user: Question: Who was the incumbent when Bo Itshaky was the Republican?
Columns: ['District', 'Incumbent', '2008 Status', 'Democratic', 'Republican', 'Green']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'John B. Larson', 'Re-election', 'John B. Larson', 'Joe Visconti', 'Stephen E. D. Fournier']
SQL:

assistant: SELECT "Incumbent" FROM "Table" WHERE "Republican" = 'Bo Itshaky';