Table: election_results_1798
Columns: district
incumbent
party
first_elected
result
candidates

Question: What is the latest first elected?
SQL: SELECT MAX("first_elected") FROM election_results_1798

Question: How many times were the candidates leven powell (f) 63.8% roger west (dr) 36.4%?
SQL: SELECT COUNT("first_elected") FROM election_results_1798 WHERE "candidates" = 'Leven Powell (F) 63.8% Roger West (DR) 36.4%'

Question: What is the district with the candidates leven powell (f) 63.8% roger west (dr) 36.4%?
SQL: SELECT "district" FROM election_results_1798 WHERE "candidates" = 'Leven Powell (F) 63.8% Roger West (DR) 36.4%'

Question: What is the district with the incumbent john nicholas?
SQL: SELECT "district" FROM election_results_1798 WHERE "incumbent" = 'John Nicholas'

Question: How many were in district virginia 6?
SQL: SELECT COUNT("candidates") FROM election_results_1798 WHERE "district" = 'Virginia 6'