Conversation so far:
What position was Franklin D. Roosevelt running for in 1940?
Franklin D. Roosevelt was running for his third term of presidency in 1940.
What was the response to Franklin D. Roosevelt running for a third term of presidency?
Franklin D. Roosevelt won the 1940 election with 55% of the popular vote, 38 of the 48 states, and almost 85% of the electoral vote.
What was Franklin D. Roosevelt unable to say?
Franklin D. Roosevelt refused to give a definitive statement as to his willingness to be a presidential candidate again.
What did Franklin D. Roosevelt indicate?
Franklin D. Roosevelt indicated to some ambitious Democrats, such as James Farley, that he would not run for a third term and that they could seek the Democratic nomination.
What did Franklin D. Roosevelt choose not to do?
Franklin D. Roosevelt promised to keep the country out of war.

Question: What is the significance of this?
Self-contained rewrite: What is the significance of Franklin D. Roosevelt promising to keep the nation out of war?