TALLINN, Estonia -- Estonia, which is providing Ukraine with more weapons than any other country relative to its economic might, is holding a general election Sunday that will determine whether it can sustain that high level of support.

Prime Minister Kaja Kallas, 45, has emerged in the past year of war as one of Europe's most outspoken supporters of Ukraine. She's seeking a second term, with her standing enhanced by her international appeals to impose sanctions on Moscow.

A Baltic nation of 1.3 million people that borders Russia to the east, Estonia broke away from the Soviet Union in 1991 and has taken a clear Western course, joining NATO and the European Union.

Polls indicate Kallas' center-right Reform Party is likely to win more votes than any other party. Her main challenger is Martin Helme, head of the nationalist EKRE party that faults Kallas for the country's inflation rate of 18.6% — one of the EU's highest — and accuses her of undermining Estonia's own defenses by giving weapons to Ukraine.

Kallas argues it's in her country's direct interests to help Kyiv.