before the meeting, that Chuck and Nancy want illegals flood to the country will put both in bind, because Trump knew they would retreat from the meeting. And they did. That retreat alone confirms to public that Trump is right. It will result in less support for both and more support for Trump in next round of negotiation.
Remember the backdrop of 2016 election, illegal immigration was big reason that Trump won. All polls on the issue has been consistently 70% against illegal immigration
What Chuck and Nancy should have done politically was to go public disputing Trump's tweet. But they acted impulsively