CREATE TABLE table_78702 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" FLOAT, "Results" TEXT)

What is the Party of District of Illinois 19 with an Incumbent First elected in 1996?
SELECT "Party" FROM table_78702 WHERE "First elected" = '1996' AND "District" = 'illinois 19'
SELECT "Party" FROM "table_78702" WHERE "District" = 'illinois 19' AND "First elected" = '1996'