Conversation so far:
How long was Harry S. Truman vice president?
Harry Truman had been vice president for 82 days when President Roosevelt died on April 12, 1945.
When did President Franklin D. Roosevelt die?
President Roosevelt died on April 12, 1945.
How did Harry S. Truman react to President Roosevelt's death?
Harry Truman asked Eleanor Roosevelt if there was anything he could do for her.
How did Eleanor Roosevelt react to Harry S. Truman asking if there was anything he could do for her?
She replied, Is there anything we can do for you? For you are the one in trouble now!“
What did Harry S. Truman do while in presidency?
In August 1945, with the invasion of mainland Japan imminent, Harry Truman approved the schedule for dropping the two available atomic bombs.
What were some events during Harry S. Truman's vice presidency?
Harry Truman's brief vice-presidency was relatively uneventful. On April 10, 1945, Truman cast his only tie-breaking vote as president of the Senate.

Question: What was the vote for?
Self-contained rewrite: What was Harry S. Truman's only tie-breaking vote as president of the Senate for?