Question: Who was the incumbent in Virginia 3?
SQL: SELECT "Incumbent" FROM "1-2668374-18" WHERE "District" = 'Virginia 3';

Question: What incumbent was a Federalist that was first elected in 1803?
SQL: SELECT "Incumbent" FROM "1-2668374-18" WHERE "Party" = 'Federalist' AND "First elected" = '1803';

Question: How many parties were first elected in 1805?
SQL: SELECT COUNT("Party") FROM "1-2668374-18" WHERE "First elected" = '1805';

Question: What district was John Dawson from?
SQL: SELECT "District" FROM "1-2668374-18" WHERE "Incumbent" = 'John Dawson';