Biden's "American Rescue Plan” includes $416 billion in funds to help launch a national vaccination program.
Power's nomination has been long speculated for weeks.
Biden said Trump's handling of Wednesday's deadly riot at the U.S. Capitol was the final straw.
Biden called Wednesday's attack "one of the darkest days in the history of our nation."
If Democrats win both seats, they will flip control of the Senate with Biden set to take office.
The President-elect criticized the Trump administration’s effort to distribute the Covid vaccine.
Biden accuses the Trump Administration of acting "irresponsibility" over lack of communication with his team.
Cardona will lead effort to make reopening schools safely a national priority.
The president-elect vowed to hold whoever is responsible for the cyberattack accountable.