FIVE YEARS ago, on May 20th, 2019, a fresh-faced Volodymyr Zelensky began his presidency with the offer of a contract to his people. “Each of us is the president,” he said from the rostrum of parliament. “This is our joint victory and chance…and joint responsibility.” The intervening years have not been kind, to him or Ukrainians in general. First came the crisis of Donald Trump and “Ukrainegate”, then covid-19, and then Russia’s terrifying full-scale invasion. By surviving this far, Mr Zelensky has already written himself into history. But as problems worsen on the front lines, the Ukrainian president may be about to face his biggest political challenge yet: renewing his contract with his people with no obvious possibility of elections.