He's put forward his proposal so unless he comes along and completely reneges on it (possible but I don't think it's likely since he'd be getting a lot of what he wants out of it) it's up to the Republicrat and Demopublican Congress Critters to negotiate off the baseline he's laid down, if they **** it up and don't come to an agreement then it's really not on the Donald since he's giving them a lot to work with here.
Personally I have no faith in either party that anything good will come out of this since the only talent that partisan dickweeds possess is taking a bad situation and making it worse.......
While I usually have zero problem criticizing the inaction and disfunction in Congress, it was literally just days ago when Trump said, on camera, (paraphrase) "Bring me a bi-partisan bill - any bi-partisan bill - on DACA, [and other matters], and I will sign it. I will not object to it or say I want my own ideas put in the bill I will simply sign it and take the heat....I'm used to taking heat."
So, literally, a bi-partisan group of 4 Democrats and 4 Republicans did just that and he reneged on the deal and his own promises.
Trump is completely untrustworthy....even more so than Congress.