CREATE TABLE table_67121 ("State ranked in partisan order" TEXT, "Percentage Republicans" TEXT, "Percentage Democrats" TEXT, "Republican/ Democratic" TEXT, "Republican seat plurality" TEXT)

What is the Republican seat plurality of North Carolina?
SELECT "Republican seat plurality" FROM table_67121 WHERE "State ranked in partisan order" = 'north carolina'
SELECT "Republican seat plurality" FROM "table_67121" WHERE "State ranked in partisan order" = 'north carolina'