He posted five videos online during the drive from Texas to New Orleans, in which he proclaimed his allegiance to ISIS and initially considered harming his family
Rep. Jamie Raskin was among the lawmakers briefed on the two incidents on New Year's Day.
Among those killed in the New Year's Day terror attack in New Orleans was a former All-Ivy Princeton football player.
Police officers have confirmed that Matthew Livelsberger, of Colorado Springs, is the driver of the Tesla Cybertruck that exploded in front of a Las Vegas hotel.
