WASHINGTON — House Republicans are launching a vast reinvestigation of the Jan. 6, 2021, attack on the U.S. Capitol, seeking to push the blame away from Donald Trump, who has been indicted over his actions or his supporters in the mob siege trying to overturn the 2020 election.As Trump campaigns to return to the White House, the House Administration subcommittee on oversight held the first of what is expected to be regular public hearings revisiting the official account, which had aired in…