WON'T GO THERE  —  In the thick of a campaign it is easy to overrate the importance of an endorsement or a political hit.  But it is difficult to overstate the significance of John Lewis' switch from the Clinton to Obama camps because it is a devastating blow on two or three levels wrapped together in a single person.

Clinton Camp May Regret Largely Turning Its Back on Caucus States  —  Among the costliest decisions Hillary Rodham Clinton's presidential campaign has made this year was to largely cede caucus states to Barack Obama.  It is one that, in retrospect, baffles Democratic strategists and, even more so, the operatives on Obama's team.