Russian politics? There are no such things since late nineties.
Whatever "opposition" is left in Russia today, is no more real than the token opposition to the CPSU that legally existed in the Soviet Union.
There is a long held Russian political tradition that long proceeded the creation of the Union: they pick the weakest enemy, the weakest opposition camp, and then surround them with spies, puppets, and then purposely let them show everybody their helpless, futile struggle.
In comparison, all credible opponents to the CPSU was dealt with in the swiftest way, without even a token trial. They either met their demise from KGB's signature potato trucks, or simply "disappeared" Latin American style.
The same was with modern Russia. The last credible, real opposition to MAFIA—KGB chimera was the Primakov-Lebed group. Lebed died in a helicopter crash, and Primakov, you know it. At the same time, KGB plotters didn't care the slightest about formal liberal opposition, because they knew that they were complete jokes, incapable of killing a fly.
Nor Primakov, nor Lebed were even remotely "liberal." That fabled "Russian liberal opposition" only existed in the imagination of Western "Kremlinologists." Those "non-violent resistance" clowns brought demise not only on themselves, but all and everybody else who was capable of standing against resurgent KGB. Their last chance assassinating Putin expired right around 2005-2006, and you know what those clowns did back then? They said "we need to bring Putin to Hague...," few month later a wave of assassinations rolled over Russia