From Jonathan Bernstein:
To begin with, we should all wish them the mildest of cases and the quickest of recoveries. I’ll say right away: Trump deserves credit for announcing the news himself after receiving the diagnosis, and it’s good that the White House put out a statement from the president’s doctor right away.
That said, there are plenty of questions, and if the administration is smart it will answer as openly as possible — and at the very least, make sure to avoid anything that’s even a little bit inaccurate. It’s essential that the nation and the world can trust the White House right now, and given this administration’s previous record (including about medical disclosures) it’s starting from a deficit. The White House physician, Sean P. Conley, said that the Trumps are “both well at this time.” That’s not going to be enough.
The public is entitled to detailed disclosure. And detailed disclosure is good for the president. It will build trust, tend to dissipate conspiracy theories and simply reassure everyone. It will likely go against every instinct Trump has to allow people to know about (much less see) any weakness, but he and those around him need to understand right now that if the White House is even once caught in a lie about this, it will mean that no one trusts anything they say again. And that’s not a position he wants to be in.