Answer:
The buttons of the campaign for president of the United States in 1956, when Dwight Eisenhower was elected, expressed a notion of continuity. One of the buttons said: "Don´t change the team in the middle of the stream".
On the other hand, the button of campaign in 2008, when Barack Obama was chosen as US president, had a message of change, for instance: "Hope wins" and "Change we can believe in".
The slogans of both campaigns refer to democratic values although the messages of the 2008 campaign hava a more optimistic sense.
Explanation: