The return of battle-hardened leaders ... will further radicalize and fuel recruitment platforms,” said Jacob Ware, a Council on Foreign Relations research fellow.

Trump's blanket order came the same day that Joe Biden used the final minutes of his presidency to issue pre-emptive pardons for his brothers and sister, as well as members of the US House of Representatives committee whose investigation into the Capitol riot concluded Trump was to blame.

Enrique Tarrio, the leader of the far-right Proud Boys, was among nearly 1,600 January 6 defendants who were either pardoned or had their sentences commuted. He is expected to be in Miami by Tuesday afternoon.