Sign up for the MSNBC newsletter
You have been successfully added to our newsletter.
Let our news meet your inbox
Letter mailed to Pres. Obama tested positive for ricin
WNBC Chief Investigative Reporter Jonathan Dienst reports that letters sent to President Obama, New York City Mayor Michael Bloomberg, and a gun control lobbyist all tested positive for ricin in preliminary testing. Investigators believe the letters were sent by the same person and that no one has been harmed.