Stealing Stolen Lines

Sunny gets excited because Cameron stole a line from an Obama speech.

Here's Cameron:

"There is no ‘them’ and ‘us’ – there is us."

Here's Obama:

"There’s no them and us – it’s just us."

But here's Clinton in 1992 (page 35):

"We're all in this together. We all have to change. There's no them and us in America. There's just us."

Clinton used that line in his stump speeches meaning he said it a lot. And Clinton's version has made it into at least one list of quotations.