Conversation so far:
how did Franklin D.
Roosevelt's career began as governor?
He agreed to run when party leaders convinced him that only he could defeat the Republican gubernatorial nominee.
how big was his victory?
Roosevelt won the party's gubernatorial nomination by acclamation.
what was the best part of his governorship?
Roosevelt's election as governor of the most populous state immediately made him a contender in the next presidential election.
how did he perform as a governor?
He also began holding "fireside chats", in which he directly addressed his constituents via the radio.

Question: what was significant about this period?
Self-contained rewrite: what was significant about the period while Franklin D. Roosevelt was governor of New York?