Students leave buses to be reunited with their parents after a shooting at Reynolds High School in Troutdale, Oregon June 10, 2014. A gunman walked into an Oregon high school and fatally shot a student on Tuesday before authorities found him dead a short time later. REUTERS/Steve Dipaola

A look at some of tomorrow’s top talkers from Washington Post reporters and columnists who know the topics best.

RECENT SHOOTINGS & GUN CONTROL: A student was killed by a gunman at a high school outside of Portland, Ore., likely to raise more questions about the gun debate. GovBeat provides a map of the 74 school shootings since Newtown.

BERGDAHL HEARINGS: Eyes will be on Defense Secretary Chuck Hagel ahead of his testimony before the House Armed Services Committee on the release of Bergdahl. And Al Kamen says we should watch for fireworks during the Senate hearing for ambassadorial nominee for Qatar, Dana Shell Smith, who will come under sharp questioning over the how the Taliban will be dealt with. Plus, this graphic provides a visual representation of the Bergdahl swap. The Fix looks at why the trade might be a political loser for the White House.

PRIMARY ANALYSIS: A conservative challenger is expected to fall far short of defeating House Majority Leader Eric Cantor (R-Va.) in Tuesday’s congressional primary in Virginia, reports Rachel Weiner. Follow PostPolitics for analysis and results from the races in South Carolina, Virginia, Maine, Nevada, North Dakota and Arkansas.

FRIENDLY FIRE DEATHS: Five American troops were killed in southern Afghanistan in a rare friendly fire airstrike that hit a team of Afghan and U.S. troops conducting a security operation ahead of Saturday’s presidential runoff election, U.S. and Afghan officials said Tuesday. It marked the deadliest day for American troops in Afghanistan since a helicopter crash in December in the same province, Zabul, killed six service members, report Ernesto Londoño and Sayed Salahuddin.