CREATE TABLE table_203_372 (id DECIMAL, "from" DECIMAL, "to" DECIMAL, "name" TEXT, "party" TEXT, "position" DECIMAL)

who served the most years as mayor ?
SELECT "name" FROM table_203_372 ORDER BY "to" - "from" DESC LIMIT 1
SELECT "name" FROM "table_203_372" ORDER BY "to" - "from" DESC NULLS LAST LIMIT 1