Authorities say the man was pacing back and forth and then pulled out the gun Monday as the motorcade went by on Cottage Grove Road while returning to Bradley International Airport, after the president gave a speech on gun control at the University of Hartford.
Bloomfield police have not released the man's name or the charges against him.
Police say officers noticed the man acting suspiciously and took him into custody by force when he pulled out the gun.
The man is expected to be arraigned in Hartford Superior Court on Tuesday.
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