Health

(to be clear, I am not one) are mostly doing so on policy and political grounds - not necessarily 'coverage'.
The basic issue is that Advantage is a mash-up of federal funding and private for profit health care administration (as was intended by designers and politicians that ushered it in to being). What it isn't, is nationalized health care as administered by the federal government - and many are going to be satisfied with nothing less than that real article.

I too am an ardent advocate for nationalized health care - and think it something of an embarrassment that the richest country in the world ... On the other hand - I have a hard time envisioning at what point over the past 25-30 years - the country had any real prospect of enacting such a system?