MEGAN MCARDLE: Arizona Kills SCHIP, Puts Medicaid on a Diet. “On the eve of the possible passage of a health care bill, Arizona has provided a glimpse of our possible future by shutting down its SCHIP program and booting a bunch of people out of Medicaid. . . . The reason this is so troubling, of course, is that the new proposed health care plan gets about half of its coverage expansion through adding people to Medicaid. The state side of this expense doesn’t show up on the books as a government expenditure (neatly enabling the bill to get a lower CBO score), but someone in America has to be taxed to pay for it, and there is a big problem when tax revenues fall short of the required expenditure.”