Well, a D-Day message. An Army officer serving overseas sent the following to Powerline:

Our troops serving overseas have received an e-mail from the “Threat Integration/Criminal Intelligence Branch”—e-mail subject line: “Kidnapping for Prisoner Exchange.” The message states that the risk to U.S. Soldiers of kidnapping in the wake of SGT Bergdahl’s prisoner exchange has increased. The message is issued as a result of “new operational hazards that pose a threst to personnel” with the following internal subject line:

Subject: Terrorist groups call for kidnapping of westerners and in particular U.S. Military members, combined with the recent release of U.S. Army Sgt Bergdahl increase the threat of kidnappings of military personnel.

The letter mentions that Al-Qaeda leaders (Zawahiri) encourage the kidnapping of Americans for the purpose of prisoner exchange and mentions Gilat Shalit, the Israeli soldier captured by Hamas and released in exchange for 1,000 prisoners, before specifically identifying the release of SGT Bergdhal in exchange for 5 Taliban prisoners as potentially signaling to terrorists that kidnapping a soldier may increase the opportunity for release of American held prisoners.

The reason Obama did not notify Congress as the law requires is that he knew they would turn him down, because anyone even slightly familiar with war knows that the result of such action would be to endanger all Americans overseas. But he did it anyway. Supposedly because he believed it will further conversations and negotiations with the Taliban, for whatever reason. The Afghans in the villages were not consulted.