CREATE TABLE table_18290 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" FLOAT, "Result" TEXT, "Candidates" TEXT)

what's the incumbent with district being massachusetts 2
SELECT "Incumbent" FROM table_18290 WHERE "District" = 'Massachusetts 2'
SELECT "Incumbent" FROM "table_18290" WHERE "District" = 'Massachusetts 2'