On May 31st, 2014, President Barack Obama ordered U.S. military special forces to rescue Sgt. Bowe Robert Bergdahl from Afghanistan. However, this was only possible by engaging in a prisoner trade with the Taliban. In this trade, the president authorized the release of five (5) high-level Taliban leaders from the Guantánamo Bay detention camp. These Taliban leaders have since been set free in Qatar with no military monitoring; they are sworn to Taliban allegiance and will return to their anti-American activities (or face execution).
President Obama did not inform the U.S. Congress of the release of prisoners as required by law.
He further has aided the enemy by releasing these five (5) Taliban leaders. Aiding the enemy is grounds for treason and impeachment as per the Constitution.