The real economic question about Elizabeth Warren's wealth tax

Sen. Elizabeth Warren is swinging for the fences with her policy platform. The Democratic presidential contender from Massachusetts has a sweeping agenda to deal with things like student debt, affordable housing, child care, the racial wealth gap, and more. It also includes taxes levied on the richest Americans: a big new wealth tax, a new corporate profits tax, and a hike in the estate tax. Of course, any genuinely ambitious agenda is also going to attract a swarm of mainstream...