Putin announces constitutional reform, his PM steps down

President Vladimir Putin accepted the resignation of his prime minister Wednesday after proposing constitutional amendments that could herald his intention to carve out a position that would let him stay at Russia's helm after his presidency ends. Russian Prime Minister Dmitry Medvedev, who served as a placeholder president in 2008-2012 to allow Putin to observe term limits, said in televised comments that he needed to resign in light of his mentor's proposed changes in government. Putin thanked