The Great Undoer

Last week was a banner week for Donald Trump—after the first week of his presidency, perhaps the most productive, at least in terms of raw political accomplishments.

The two big headlines, pulling the plug on subsidies in Obamacare insurance markets and tossing the Iran nuclear deal to Congress, are both highly fraught. Yet with these two decisions, President Trump has brought himself closer to following through on major campaign promises than nearly anything else he has done as president.

There are two notable things about the moves. First, they are both incomplete. President Trump has neither repealed and replaced Obamacare, nor has he shredded the Iran deal. Second, they have real potential downsides. Ending the Obamacare subsidies could end with millions of people losing their health insurance, a disaster both moral and, potentially,