The US envoy, along with ambassadors from other NATO allies, attended the Hungarian parliament to pressure Budapest to approve Sweden's bid to join the alliance. The ruling Fidesz party lawmakers boycotted the extraordinary session called by the opposition, delaying the ratification. Hungary is the only NATO state yet to ratify Sweden's accession, straining relations with the United States and its allies. Prime Minister Viktor Orban's government supports Sweden joining NATO, but the relevant bill has been stalled in parliament since mid-2022. The US ambassador urged Hungary to act expeditiously, while Fidesz suggested that the Swedish prime minister visit Budapest before ratification.