COVID-19 pandemic, says the head of the federal housing agency.The Canada Housing and Mortgage Corp. is a key overseer of the decade-long national housing strategy, which includes tens of billions in federal and provincial funding and financing.It has been criticized for the slow turnaround time on some of its national housing strategy programs, including by smaller housing providers who have complained about the reams of paperwork needed to access them.Some of that is unavoidable, said CMHC president Evan Siddall, as lending federal money through the programs requires diligence.