One of the things that we have to change in this country is the idea that people can’t disagree without challenging each other’s character and patriotism,” he said, to applause. “I have never suggested that Senator McCain picks his positions on national security based on politics or personal ambition. I have not suggested it because I believe that he genuinely wants to serve America’s national interest. Now, it’s time for him to acknowledge that I want to do the same. Let me be clear: I will let no one question my love of this country. I love America, so do you, and so does John McCain.
Obama To McCain: Dignify Your Campaign