Yale's Bruce Ackerman, a constitutional scholar, warns that unilateralism in the "most dangerous branch" of government is setting the stage for a tragic future.
The study of decaying presidential popularity finds Barack Obama's large point decline in his first year fits into the pattern of all recent chief executives.
Candidate's victory speech at the conclusion of the 2008 Iowa Democratic caucus has political scientists comparing it to ones delivered by icons of oratory from years past.