MOSCOW—Russians voted overwhelmingly to improve their country’s structure, paving the way for President Vladimir Putin to remain in energy and chart Russia’s future for several years to appear.

With fifty% of polling stations reporting, preliminary results confirmed that 76% of voters on Wednesday accepted the deal of some two hundred constitutional amendments that include things like a revision to reset the clock on the current restrict of two consecutive presidential conditions. That would permit Mr. Putin to possibly operate two much more instances soon after his current tenure…