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I'm immensely grateful to Donald Trump, because he's helped frame the central issue of this primary as, 'Who will stand up to Washington?' Well, if that's the central issue, the natural follow-up question is, OK, ' Who has stood up to Washington?' And who's stood up, not just to Democrats but to leaders in their own party, and that there is an enormous difference, if the central question of this primary is who will stand up to Washington and who has stood up to Washington, we win.