The selection of Paul Ryan has changed the dynamics of the 2012 election in ways that, for the moment, seem to advantage President Obama and the Democrats. It has focused attention on a few key issues that should be Democrats' strength while diverting the spotlight from the slow economic recovery that is Obama's Achilles heel. Do most Americans really want to voucherize Medicare and privatize Social Security? Do we want drastic cuts in what's left of other social supports in order to give even larger tax cuts to millionaires? Most polls suggest not, and bumper stickers have already been appearing: Save Medicare, vote Democratic.