Russia's Supreme Court on Monday barred Yabloko, the country's only liberal, anti-war party, from contesting next month's parliamentary elections, France24 and the BBC reported.

Why it matters: no party campaigning against the war in Ukraine will appear on the September ballot.

Hypothesis: the ban fits a broader Kremlin effort to lock in a wartime political consensus ahead of the election, foreclosing any legal opposition platform while the war continues. Supporting this: the ruling strips the ballot of the only party that had run on an anti-war line. Against this: neither the BBC nor France24 report cites the court's stated legal grounds, so whether the ruling targeted Yabloko's anti-war stance is unconfirmed.

What to watch: whether Yabloko appeals the ruling, and whether authorities move against remaining independent or critical candidates before September's vote.