All of a sudden, progressives have discovered the separation of powers. After eight years spent ridiculing tea partiers who bitterly cling to the Constitution, liberals now embrace its structural protections as their last, best hope to stop President Trump. Today’s Left is just the most recent social movement that has appealed to the Framers after failing at the ballot box. And while I always welcome new students of originalism, I can offer only two cheers for our fair-weather constitutionalists. Their conversion, alas, is born of political expediency, not any sense of constitutional consistency.
From 2009 through early 2017, President Obama’s supporters …
