Thirty-six medical experts have formally warned Congress that President Donald J. Trump is mentally unfit to serve and should be removed from office "with the greatest urgency," saying he "presents a clear and present danger" to the country and the world. The group, made up of neurologists, psychiatrists, geriatricians and other clinicians, points to worsening cognition, grandiose delusions and severely impaired judgment as core concerns. Their statement, now printed in the Senate's Congressional Record, is drawing fresh scrutiny this week as lawmakers and reporters pore over the evidence. The experts frame their intervention as a national security warning rather than a partisan broadside.