CREATE TABLE table_18237 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" FLOAT, "Result" TEXT, "Candidates" TEXT)

Who was the candidate in the Virginia 3 district election?
SELECT "Candidates" FROM table_18237 WHERE "District" = 'Virginia 3'
SELECT "Candidates" FROM "table_18237" WHERE "District" = 'Virginia 3'