The person who is on the Democratic ticket for the position of Office of U.S. Senator was who?
CREATE TABLE table_name_68 (
    democratic_ticket VARCHAR,
    office VARCHAR
)
SELECT democratic_ticket FROM table_name_68 WHERE office = "u.s. senator"
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: The person who is on the Democratic ticket for the position of Office of U.S. Senator was who? ### Input: CREATE TABLE table_name_68 (
    democratic_ticket VARCHAR,
    office VARCHAR
) ### Response: SELECT democratic_ticket FROM table_name_68 WHERE office = "u.s. senator"