What Was Haman’s Rush
הרצים יצאו דחופים בדבר המלך
“The couriers went out post-haste on the royal mission.” (Esther 3:15)
After Haman made his decree to wipe out and destroy the Jewish people, the Megillah stresses that he quickly sent out messengers to promulgate the royal decree. In light of the fact that this took place on the 13th of Nissan and the date of the planned genocide was the 13th Adar, which wasn’t for another 11 months, why did Haman feel such a tremendous sense of urgency?
On a simple level, Rav Elisha Galiko, who served on Rav Yosef Caro's Beis Din in Tzfas, explains that Haman was afraid that Achashveirosh might reconsider and change his mind, so he sent out the letters immediately before he could have a chance to do so.
The Medrash adds that this is why Haman’s next step was to sit down to drink with Achashveirosh (3:16), so that he would get drunk and not be able to interfere with the messengers until after they had already departed.
