have other indices of real economic disorder, the basic backbone of trump's re-election claimed i'm a businessman, i know what's good for the economy, begins to weaken. in that case i can republican a republican challenge. if it feels like the country's in a freefall, i bet you will see a credible candidate challenge donald trump. >> i agree with that. and we've been asking this question when are the republicans going to stand up for years now and nothing's happened. but i think david is right. this is the one thing that i think might trigger it because it would be an existential, you know, challenge to the republican party if they see that there's going to be an absolute wipeout. and the fact that the trade war is really out of control, this is one of the few issues where there have been willing to push back just a little bit.