Richard Nixon actually said...
I want to say this: that as you vote on November the 8th - and I say this to all of you, whether you're Democrats or Republicans or independents, because this campaign is so important - the decision you will make is so critical, that I say what you should do is not to think of the party first, but of America first, and vote for whatever is best for America.
Context
Remarks of the Vice President, Rear Train Platform, Dayton, OH
10/25/1960