A key Obama constituency - Ivy League historians - is

over the tendency, in and out of the Obama organization, to compare the president-elect to Lincoln:

"Some scholars think the comparisons have gone a bit over the top hat.

Sean Wilentz, a scholar in American history at Princeton, said many presidents have sought to frame themselves in the historical legacies of illustrious predecessors, but he couldn't find any examples quite so brazen."

Setting the bar high is no doubt a good thing - who should Obama emulate,

? - but then you have to make the jump.

for Philly.com's politics page.