The several hundred people gathered inside a hall in the Moldovan village of Pirlita wore winter clothes to keep out the chill. Heating is a luxury the local mayor can’t afford, even when the president visits. The scene was a sharp reminder of the economic backdrop for Maia Sandu, the country’s leader the past four years, as she seeks re-election in a runoff vote on Sunday that has geopolitical implications beyond the tiny nation.

Moldova is one of the poorest places in Europe, sandwiched between the relative riches of Romania and war-torn Ukraine. Sandu is determined to persuade her country the path toward European Union integration is the right one, but it’s also one Russia is keen to derail. A referendum two weeks ago on future membership unexpectedly saw Moldova split down the middle.

Sandu, 52, faces Alexandr Stoianoglo, 57, a former general prosecutor who favours closer ties with Moscow, with everything to play for. Sandu secured 42% of the vote in the first round held the same day as the EU referendum versus 26% for her opponent. The gap is expected to have significantly narrowed as Stoianoglo picks up ballots from other pro-Russian candidates.

While Sandu has enjoyed the support of EU leaders passing through the country in recent months, her opponent has benefited from what Western governments have called a disinformation campaign led by pro-Russian politicians. Moldovan authorities also accused Russia of bribing voters, which Moscow denies. The vote comes a wee.