A day that began with the outgoing president’s pardon of lawmakers and his own family ended with the incoming president’s pardon of supporters who attacked the U.S.

The extraordinary wave of pardons Monday — from Joe Biden as he left the White House and from Donald Trump as soon as he returned to it — demonstrate the potency of the Constitution’s pardon power, but also expose its perils,

Biden Monday issued several preemptive pardons, some to family members. Following the transition of power, Trump wielded his own clemency power.

President Donald Trump announced on Tuesday a private-sector investment of at least $500 billion in artificial intelligence infrastructure that will create over 100,000 U.S. jobs. Stargate is the jointly owned venture that OpenAI,

Joe Biden pardoned his siblings and their spouses on his way out of the White House, saying Monday that his family had been “subjected to unrelenting attacks and threats, motivated solely by a desire to hurt me — the worst kind of partisan politics.