More business groups have asked the Biden administration to delay its announced COVID-19 mandate until after the holiday season is over, coming just days after a shipping organization issued a warning that the proposed rule would trigger widespread supply chain chaos during Christmas. Evan Armstrong, a lobbyist at the Retail Industry Leaders Association, told CNBC that his organization is concerned that President Joe Biden’s rule would trigger a surge in resignations and would cause even more staffing shortages. “It has been a hectic holiday season already, as you know, with supply chain struggles,” Armstrong said after meeting with officials at the White House. “This is a difficult policy to implement. It would be even more difficult during the holiday season.” “We’re already having supply chain issues; we’re already having workforce shortage issues,” Ed Egee, a top lobbyist at the National Retail Federation, told the network after a meeting with federal …