DACA Negotiations

In NRO yesterday afternoon, I argued that the White House undermines its political position (and that of congressional GOP) if it decides to champion a trade of "border security" for a DACA replacement.  Today, Trump had this to say on Twitter:

CHAIN MIGRATION cannot be allowed to be part of any legislation on Immigration!

— Donald J. Trump (@realDonaldTrump) September 15, 2017

Is that a sign the president is going to demand that elements of the RAISE Act be part of any DACA bill?  We'll have to see...