Unfortunately, you did not include any excerpt, text, reference or context, to know what kind of speech you are talking about. However, trying to help you, we are going to assume you are talking about the Declaration of Neutrality speech of 1914.
If this is the case, then the correct answer is "to make sure America remains neutral and united."
In his conclusion, Wilson declares that Americans "must put a curb upon our sentiments." Why did Wilson make this statement?
Answer:
"to make sure America remains neutral and united."
Literally, in that speech before Congress, President Woodrow Wilson said: "...The United States must be neutral in fact, as well as in name, during these days that are to try men's souls. We must be impartial in thought, as well as action must put a curb upon our sentiments, as well as upon every transaction that might be construed as a preference of one party to the struggle before another."
The passage is from President Woodrow Wilson's Declaration of Neutrality in 1914. The speech affected US involvement in World War I in that it caused the US to remain isolated and neutral.
Although President Woodrow Wilson wanted to maintain a foreign policy of neutrality, critical events such as the inking of the Lusitania ship and the interception of the Zimerman telegraph where Germany asked the help of México supporting German troops, made Wilson enter the war. The United States entered World War 1 on April 6, 1917, to support Great Britain and France.