Nope, nukes will prevent that.
What we saw with Venezuela was something nukes wouldn't prevent. Doing the same with Putin is infinitely harder, but if it did occur, chances are whoever fills in the power vacuum in Russia would be pretty happy with their situation.
Episodes like these only serve to cement that Iran and North Korea are right to think that having nuclear deterrence is the only viable insurance policy.
(Delivery & effectiveness is another subject on its own but still)