which were issued by executive actions and could be easily undone.
（President-elect Joe Biden will formally introduce his top economic policy advisers on Tuesday as his administration prepares to take power amid a slowing economic recovery hampered by the resurgent coronavirus pandemic.The former vice president has focused on preparing his incoming administration.
還Trumps challenges to Bidens victory have been rejected by courts across the country.
國(guo)said William Mary Law School professor Rebecca Green.
個Machine-assisted voting - either via voter-facing touch screens or behind-the-scenes ballot tabulation software and digital poll books - has for years been the subject of persistent worries over security and reliability.
REUTERS/Cheriss MayWASHINGTON (Reuters) - U.