Conversation so far:
What were his views on diplomacy?
When the war started Seward turned his attention to making sure that foreign powers did not interfere in the conflict.
How did he make sure they didn't interfere?
Seward sent word to the American representatives abroad that the U.S.
would become party to the Paris Declaration Respecting Maritime Law of 1856.

Question: What else did he do in politics?
Self-contained rewrite: What else did William H. Seward do in politics other than make sure that foreign powers did not interfere in the conflict??