One of the things that I think you see sometimes in politics is a certain degree of caution. It's usually advised by consultants who don't want to see you march to the end of a limb.

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The Democrats co-opted the credit for the Civil Rights Act of 1964. But if you go back and look at the history a larger percentage of Republicans voted for that than did Democrats. But a Democrat president signed it so they co-opted credit for having passed the Civil Rights Act of 1964 and the Voting Rights Act of 1965.