President Vladimir Putin said on Sunday constitutional amendments approved in a nationwide vote created the conditions for Russia's "progressive development" for decades to come. One of the changes approved in the week-long vote that ended on July 1 makes it possible for Putin to seek two more terms as president and, if re-elected, to stay in power until 2036. "They will strengthen our nationhood and create conditions for the progressive development of our country for decades to come," he said.