Feb. 13 (UPI) -- A powder substance found in a letter that sent President Donald Trump's daughter-in-law and mother in-law to the hospital, as a precaution, was found to be cornstarch.
The letter was addressed to Donald Trump Jr., the president's eldest son, and sent to the house of his mother-in-law, Bonnie Haydon -- who passed the envelope to her daughter, Vanessa Trump.