at 10 am on c-span2 irs commissioner daniel warfel testifies in an oversight hearing about the tax filing season and recent changes at the irs. on c-span 3 also at 10 a.m. am easrn healthcare officials and the cdc and f testify on the effectiveness of vacce safety reporting after the rollout of the covid 19 vacce. you can also watch our live coverage on the free c-span now video apps or online, c-span.org. >> friday nights, watch c-span's 2,024 campaign trail, weekly roundup of c-span's campaign coverage providing 1-stop shop to discover where the candidates are traveling across the country and what they are saying to voters, this along with first-hand accounts from political reporters, updated poll numbers and campaign ads. watch c-span's 2,024 campaign trl. friday night at 7 eastern on c-span, online, c-span.org or download as a podcast on c-span now. a free mobile apps or wherever you get your podcast. c-span, your unfiltered view of politics. american history tv saturdays on c-span2 exploring the people in the events to tell the american story. at 6 p.m. eastern authors kate mazer and