US intelligence obtained information from a human source about an Iranian plot to assassinate Donald Trump, which led the Secret Service to increase security for the former president. The plot is said to be unrelated to the attempt on Trump's life at a rally in Pennsylvania by Thomas Crooks. Iran has vowed revenge for the US killing of Qasem Soleimani, and Trump officials like John Bolton faced assassination plots. Secret Service officials have repeatedly warned the Trump campaign that outdoor rallies pose greater security risks than more controllable events. A Secret Service spokesperson stated that the agency continuously adjusts to new threat information and responds seriously to threats.