Soon after Vladimir Putin is re-elected on Sunday, his thoughts will turn to the question that is likely to dominate his next term as Russia's president: What will he do when it ends?
Putin's victory in the presidential election is not in doubt, as his ratings are high and he has the state machinery behind him. But how long the man who has dominated Russia for nearly 18 years wants to stay power is uncertain.
The constitution limits the president to two successive terms, obliging him to step down at the end of his mandate — as he did in 2008 after serving two four-year terms.