Dan Balz of the Washington Post explains why Republicans want to launch yet another investigation into the Benghazi killings and why Democrats are pushing back. Pete Williams of NBC news explains why the Supreme Court may have rejected another case involving gun rights. And Coral Davenport of the New York Times comments on how climate change is already impacting Florida.

The kidnappings of nearly 300 schoolgirls in Nigeria by Boko Haram; the White House released a new report on climate change; the SCOTUS ruling to uphold prayer at government meetings; and a roundup of the primaries that marked the unofficial launch of the midterm season. Joining Gwen: Hannah Allam, McClatchy Paper; Dan Balz, Washington Post; Coral Davenport, The New York Times; Pete Williams, NBC