Retiring Guy doesn't recall Speaker Robin Vos objecting to members of the Wisconsin State Assembly being sworn in on Rosh Chodesh Sh'vat (Monday, January 7, 2019)

Source:  Hebcal..com

Source:  Ballotpedia

Not a peep from Ken, either.

Robin Vos requests Tony Evers reschedule special election, citing Jewish holiday.  (Wisconsin State Journal, 9/27/2019)

Rabbi Jonathan Biatch, with Madison's Temple Beth El, said Hanukkah does not come with the same restrictions as the Jewish community's more sacred festival days. 

Biatch said members of the Jewish community cannot drive or use electricity during five sacred holidays during the year and on Shabbat, which is held every Saturday. Such prohibitions don't exist for Hanukkah, he added. 

"That's wonderful that he recognized it, but the fact is we don't have religious restrictions on those days. Voting is not a problem on those days," Biatch said.

Nor does he recall any objections to these conflicts.

Sources:  Wisconsin State Legislature, 2019 Jewish holidays, 2020 Jewish holidays