WASHINGTON—U.S. President Joe Biden, facing roadblocks to his domestic agenda and a renewed fight against COVID-19, will start the new year surrounded by a new friend in Washington: a nearly 4-month old German Shepherd named Commander. Biden showcased the new arrival in a video posted online on Monday featuring the puppy on White House grounds alongside first lady Jill Biden, about six months after their previous pet, German Shepherd Champ, died. The Bidens’ other dog, a young German Shepherd named Major, initially joined the couple at White House after Biden’s inauguration in January, but his tenure suffered from reported bite incidents with staff at the grounds. Major is now living offsite with family friends, Jill Biden’s spokesperson Michael LaRosa said in a statement, adding the move was “not in reaction to any new or specific incident.” The president’s canine companions marked the return of pets to the White House after …