Hunka's service history reveals that he served in World War II as a member of the 14th Waffen Grenadier Division of the SS, a fact that has generated controversy.
The speaker, Anthony Rota, apologized in the House but has resisted growing calls to quit.
Speaker of the House of Commons says he did not know that 98-year-old Yaroslav Hunka had volunteered with Nazi army in World War II * PM Justin Trudeau calls the incident "extremely upsetting"
A number of countries, including the United States, face internal political pressure to stop or curtail spending on weapons sent to Ukraine.
Ukrainian commanders have described the capture of Klischiivka and nearby Andriivka as stepping stones to taking back Bakhmut, which fell to the Russians after months of fierce fighting.
President Volodymyr Zelensky said this week that Kyiv would retake the Bakhmut following the capture last week of Andriivka and Klishchiivka to the south.
Biden said the first American Abrams tanks will be delivered to Ukraine next week.