CREATE TABLE table_12872 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Results" CLOB)

From which party is the incumbent who was first elected to office in 1990?
SELECT "Party" FROM table_12872 WHERE "First elected" = '1990'
SELECT "Party" FROM "table_12872" WHERE "First elected" = '1990'