CREATE TABLE table_28906 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" FLOAT, "Result" TEXT, "Candidates" TEXT)

Name the incumbent for jacob spangler (dr) 67.1% jacob hay (f) 32.9%
SELECT "Incumbent" FROM table_28906 WHERE "Candidates" = 'Jacob Spangler (DR) 67.1% Jacob Hay (F) 32.9%'
SELECT "Incumbent" FROM "table_28906" WHERE "Candidates" = 'Jacob Spangler (DR) 67.1% Jacob Hay (F) 32.9%'