By any conventional political calculation, health care is a tempting target for Democrats. There is an undeniable opportunity cost in Democrats’ decision to focus the government shutdown — the party’s best chance this year to galvanize public attention — on health care. I’ve criticized that emphasis, but maybe it’s unrealistic to expect Congressional Democrats to lead that fight. Whatever the ultimate merits of those competing approaches, this showdown shows again that Congressional Democrats have chosen their principal battlefield against Trump-and that it is not preserving democracy. Whether such a broad-based movement coalesces will determine what American democracy looks like at the end of Trump’s term far more than the choices Congressional Democrats make, as this shutdown will surely demonstrate.