text:  Live from NPR News in Washington, I'm Corva Coleman. The FBI is leading the investigation into the motive of the man it has identified as the suspect in the attempted assassination of former President Donald Trump Saturday. None has yet been revealed. Yesterday, President Biden ordered an independent review of the attack and says he will publicly share the results of the findings. Biden spoke from the Oval Office last night. In his address, Biden says the temperature needs to be turned down in American politics. NPR's Tamara Keith reports.