If Democrats are serious about resisting President Trump, their inviolate aim must be to place and enforce new structural limits on the presidency itself, not just on this president.

Anything less is a jerry-built fix. It may see us through another year or six of Trump, frustrating his most egregious impulses (more on that in a moment) and giving him ample fodder for tweets complaining of Democratic obstructionism. It will not solve the underlying failure of balanced government that Trump has been able to exploit, which means it will leave us equally vulnerable to the whims of any president not hemmed by a congressional supermajority from the opposing party.