At a time when centrism has become a dirty word in some Democratic Party circles, hundreds of the party's avowed moderates are convening in Denver this weekend to discuss their agenda for this fall's election and the presidential contest in 2008. The annual meeting of the Democratic Leadership Council, a group that came to prominence in connection with President Clinton's electoral victory in 1992, takes place as the organization has become a lightning rod for criticism from liberal Web-based activists known as the netroots. The Denver gathering is scheduled to hear from the putative Democratic frontrunner for 2008, Senator Clinton,...