MOSCOW—Russian citizens are set to get started voting on constitutional modifications that could allow President Vladimir Putin to continue being in office environment for decades to come, potentially cementing his hold on power and placing to relaxation speculation as to who might ultimately be successful the Kremlin leader.
If handed, the constitutional amendments would reset the clock on presidential expression limitations, making it possible for Mr. Putin to operate for two additional conditions after his latest tenure finishes in 2024. At present, expression limitations would compel Mr. Putin, who has held energy in Russia…