WASHINGTON (AP) - Congress convened Sunday for the start of a new session, swearing in lawmakers during a tumultuous period as a growing number of Republicans work to overturn Joe Biden's victory over President Donald Trump and the coronavirus surges.Democrat Nancy Pelosi was set to be re-elected as House speaker by her party, which retains the majority in the House but with the slimmest margin in 20 years after a November election wipeout.