which united states president appointed the most ambassador 's to mexico
CREATE TABLE table_203_69 (
    id number,
    "representative" text,
    "title" text,
    "from" number,
    "to" number,
    "appointed by" text
)
SELECT "appointed by" FROM table_203_69 GROUP BY "appointed by" ORDER BY COUNT(*) DESC LIMIT 1
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: which united states president appointed the most ambassador 's to mexico ### Input: CREATE TABLE table_203_69 (
    id number,
    "representative" text,
    "title" text,
    "from" number,
    "to" number,
    "appointed by" text
) ### Response: SELECT "appointed by" FROM table_203_69 GROUP BY "appointed by" ORDER BY COUNT(*) DESC LIMIT 1