CREATE TABLE table_27310 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" FLOAT, "Result" TEXT, "Candidates" TEXT)

Name the number of district for bill shuster
SELECT COUNT("District") FROM table_27310 WHERE "Incumbent" = 'Bill Shuster'
SELECT COUNT("District") FROM "table_27310" WHERE "Incumbent" = 'Bill Shuster'