A panel of federal appellate judges on Thursday seemed skeptical of legal arguments made on behalf of Republican U.S. Rep. Mike Bost, who claims Illinois’ law allowing counting of mail-in ballots for two weeks after an election is in violation of federal law.Bost’s late 2022 lawsuit was filed with help from a conservative group that assisted former President Donald Trump’s efforts to block the counting of mail-in ballots after Election Day 2020. The suit named the Illinois State Board of Elections, seeking the court’s …