First Thing: Biden accuses Trump administration of blocking national security access

Joe Biden says his team has been met with obstruction from leaders at the Pentagon as they prepare for inauguration. Plus, Trump is humiliated after Republicans join Democrats to override his veto

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Good morning.

Joe Biden has accused Donald Trump of blocking his access to national security information, saying that his security team has been met with obstruction from political leaders at the Pentagon. The president-elect warned that he and his team just aren't getting all of the information that we need" in key national security areas, describing it as nothing short of ... irresponsibility". Earlier this month, the Pentagon unexpectedly suspended briefings with the Biden transition team.