Run on a platform saying that government doesn't work, and once in office govern in a way that proves the premise!
Brilliant.
If a Democratic president gets elected in 2020, it'll be interesting to watch whether this standard gets upheld. (Most likely the Republicans will complain about how the Democrats are attacking loyal Americans working hard for their government, and the Democrats will do their usual thing of feeling bad and giving in.)
Democrats are unlikely to give in again. Giving in is what drive away their base cost them the election in 2016. If they do it again in 2020, the party is dead.
If executive behavior should be constrained by previous administration's decisions, then Congress or if necessary a Constitutional convention should make a law to establish that.
If our country is so divided that we can't maintain basic consistency across changing administrations, then we don't deserve to be a country anymore, and we should split into 2.
An unenforced, unmaintained agreement is the same as pulling us out, and it erodes trust in the United States on the international stage. Yes, the OP was talking about domestic policies; I was saying that historically some of those things would still be maintained, rather than introduce complete instability with every administration, and that this administration has broken that precedent both on the domestic and the international front.
Consumer financial protection is now in charge of making sure corporations can harm consumers without obstacle.