CREATE TABLE table_6560 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" FLOAT, "Result" TEXT)

How much First elected has a Result of re-elected, and a Party of republican, and a District of illinois 4?
SELECT COUNT("First elected") FROM table_6560 WHERE "Result" = 're-elected' AND "Party" = 'republican' AND "District" = 'illinois 4'
SELECT COUNT("First elected") FROM "table_6560" WHERE "District" = 'illinois 4' AND "Party" = 'republican' AND "Result" = 're-elected'