The driver of a rented box truck that collided with a security barrier near the White House on Monday who told law enforcement that he wanted to seize power of the government and kill the president was arrested and charged, officials said.The FBI interviewed suspect Sai Varshith Kandula, 19, of Chesterfield, Missouri, and told law enforcement that he wanted to seize power, take over the government and kill the president, according to three law enforcement sources. Sources tell ABC News that authorities are looking at a mental health component to the investigation.The U-Haul truck crashed at about 10 p.m. on...