WASHINGTON — The House Jan. 6 committee was set to unveil “surprising” details including evidence from Donald Trump’s Secret Service about the 2021 attack on the U.S. Capitol in what is likely to be its last public hearing before the November midterm elections.The hearing Thursday afternoon, the 10th public session by the panel, is expected to delve into Trump’s “state of mind” and the central role the defeated president played in the multipart effort to overturn the election …