On Sunday, FBI officials announced that they found a "rudimentary" explosive device in the car of Thomas Matthew Crooks, the 20-year-old gunman who attempted to assassinate former President Donald J. Trump at a rally in Pennsylvania.

According to F.B.I. officials on Sunday, the 20-year-old gunman who attempted to kill former President Donald J. Trump at a rally in Pennsylvania appears to have acted alone. However, they are still unsure of his motivations and political views and have not ...