user: Question: What is the party when the candidates were Ernest Istook (R) 69% Garland McWatters (D) 28%?
Columns: ['District', 'Incumbent', 'Party', 'First elected', 'Results', 'Candidates']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Oklahoma 1', 'Steve Largent', 'Republican', '1994', 'Re-elected', 'Steve Largent (R) 70% Dan Lowe (D) 30%']
SQL:

assistant: SELECT "Party" FROM "Table" WHERE "Candidates" = 'Ernest Istook (R) 69% Garland McWatters (D) 28%';