Congressional Endorsements in the Presidential Nomination Process: Democratic Superdelegates in the 2008 Election

Examining congressional superdelegate endorsements in the 2008 Democratic presidential nomination, the authors show that changes in the political context affected the balance of factors in members’ decisions to endorse Clinton or Obama. Specifically, the national standing of the candidates became increasingly important—and local opinion less important—to Obama endorsements even as constituency views became a stronger influence over Clinton endorsements. The findings reveal how constituency considerations affect the elite endorsement choices that shape the presidential nominating process. In addition, the analysis highlights the ways in which members of Congress balance conflicting considerations in a changing political context when an issue plays out over an extended period.

Congressional Endorsements in the Presidential Nomination Process: Democratic Superdelegates in the 2008 Election

Examining congressional superdelegate endorsements in the 2008 Democratic presidential nomination, the authors show that changes in the political context affected the balance of factors in members' decisions to endorse Clinton or Obama. Specifically, the national standing of the candidates became increasingly important-and local opinion less important-to Obama endorsements even as constituency views became a stronger influence over Clinton endorsements. The findings reveal how constituency considerations affect the elite endorsement choices that shape the presidential nominating process. In addition, the analysis highlights the ways in which members of Congress balance conflicting considerations in a changing political context when an issue plays out over an extended period.

The overexpression of homeotic complex gene Ultrabithorax in the post-embryonic neuronal lineages of the ventral nervous system in Drosophila melanogaster

This study uses a molecular technique called MARCM (Mosaic Analysis with a Repressible Cell Marker) to label neuronal lineages that overexpress the Hox gene Ultrabithorax (Ubx) in an unlabeled, wild type background. The results indicate that the overexpression of Ubx is sufficient to transform more anterior neuronal lineages to themorphology of their more posterior counterparts. The data presented here begin to elucidate the role that the Hox genes have in shaping segment-specific neural connections in the post-embryonic ventral nervous system.