CREATE TABLE table_18356 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" FLOAT, "Result" TEXT, "Candidates" TEXT)

What is the party of the election in which Robert Bauman is the incumbent?
SELECT "Party" FROM table_18356 WHERE "Incumbent" = 'Robert Bauman'
SELECT "Party" FROM "table_18356" WHERE "Incumbent" = 'Robert Bauman'