Russian PM resigns after Putin proposes changes that would make him 'leader for life'
The CIA source reportedly had top-level access to Russian leader Vladimir Putin Sputnik/AFP/File / Mikhail Klimentyev

Russian prime minister Dmitry Medvedev has resigned, along with the entire Russian government.

Medvedev, who was considered a possible successor to Russian president Vladimir Putin, will resign immediately along with the rest of the Russian cabinet and become deputy head of the security council.

Putin on Wednesday proposed a referendum on a package of reforms to Russia's constitution that would strengthen parliament, fueling speculation about his political future after 20 years in power.

The 67-year-old Putin's fourth Kremlin term is set to expire in 2024.