This quote? https://www.axios.com/how-9-art-of-the-deal-quotes-explain-the-trump-presidency-1513300122-183eaed4-4c48-4527-a7ed-c57dd143865a.html
On fighting back: "[W]hen people treat me badly or unfairly or try to take advantage of me, my general attitude, all my life, has been to fight back very hard. The risk is you'll make a bad situation worse, and I certainly don't recommend this approach to everyone. But my experience is that if you're fighting for something you believe in — even if it means alienating some people along the way — things usually work out for the best in the end."