Final answer:
Indiana has voted for a Democratic presidential candidate five times since 1940, during the elections of 1948, 1964, 1976, 1980, and 1996.
Step-by-step explanation:
Since 1940, Indiana has voted for a Democratic candidate in presidential elections a total of five times. These instances were during the elections of 1948 for Harry S. Truman, 1964 for Lyndon B. Johnson, and 1976, 1980, and 1996 when Indiana supported Jimmy Carter and Bill Clinton respectively. This voting pattern reflects significant changes within the political landscape and voter realignment following key periods such as the New Deal era and societal shifts in the later 20th century.