 Delays and cancellations are worldwide. There is growing pressure on President Biden to withdraw from the presidential race. The latest polls show his support may be slipping. CBS's Major Garrett. The camp is responding. Everything is the same. Biden is not moving. He is digging in. And the pressure, though, building is irrelevant to Biden, at least for now. But the polls are down. The isolation is real. And the walls are closing in on the president and the future of his campaign.