WASHINGTON (AP) — Senior officials from President-elect Donald Trump’s administration, including the majority of his designated Cabinet nominees, were at the White House on Wednesday to participate in a transition exercise hosted by President Joe Biden ...

National security officials in previous administrations have characterized the exercise, which is a required part of the presidential transition ... Liz Sherwood-Randall, Biden’s homeland ...

President Joe Biden is deploying 1,500 additional active-duty troops ... President Andrés Manuel López Obrador and U.S. Homeland Security Advisor Dr. Elizabeth Sherwood-Randall met in Mexico City where they ultimately agreed on a set of additional ...