but we begin this morning with omicron overwhelming the country, becoming the dominant variant in the u.s. in what seems to be the blinkover an eye. the cdc says it now makes up 73% of new infections, a stunning escalation from just a week ago when it was about 13% of new cases. in just hours, president biden will announce his administration s plan to tackle the covid surge, including shipping half a billion free at-home covid tests to any american who wants one starting next month. this wave, of course, happening just days before christmas. the tsa is expected to screen 30 million people between now and january 3rd. and this morning, dr. fauci addressed families who are planning to get together. if you don t have the availability of the test and you are fully vaccinated and boosted, you should feel comfortable having a holiday meal or gathering with family members who are also vaccinated and boosted. reporter: joining me now,