Vladimir Putin was reelected for a fifth presidential term on March 17th.
A week later, an attack at the Crocus City Hall left 144 dead, the worst terrorist act in Russia in two decades.
The attack was claimed by the Islamic State of Khorasan, but Putin attempted to establish a connection with Ukraine without implicating Kiev.
The attack contradicts Putin's narrative that Russia's only existential challenge comes from confrontation with the West.
A warning from the United States about an imminent terrorist threat was ignored by Russian authorities.
The attack evidences that freedoms in Russia have suffered under a repressive regime that hasn't provided the due protection.
Conclusion: The attack, proof of the ongoing threat of terrorism and Putin's regime's failure to anticipate and protect its citizens, signifies a deep setback for the Kremlin.