Megan McArdle is bemused: “I remain mystified by the certainties about [Hillary Clinton’s] prospects.” And Megan had a good list of why those prospects aren’t as good as they appear, starting with Sec. Clinton’s age and ending with the way that both the Democratic party and Barack Obama are going to be drags on her campaigning*. However, I don’t think that it’s really that confusing about why the Left’s pundits remain bullish on Clinton: