Joe Biden Introduces New Puppy On Twitter: 'Welcome To The White House, Commander'

The White House just welcomed a new resident! On Dec. 20, President Joe Biden introduced the world to a new first dog.

"Welcome to the White House, Commander," Biden, 79, tweeted along with a photo of the adorable puppy running through the grass with a tennis ball in its mouth. The president also shared a video welcoming the new pet ("hey, pal").