Donald Trump Jr. Tweets That Wife is 'Safe' After Letter Threat On Monday, Trump's daughter-in-law, Vanessa Trump, was taken to the hospital after opening a letter with a white powdery substance. CBS News reported she was being tested but has not been hospitalized. Vanessa's mother and one other unidentified individual were also taken to the hospital as a precaution. Ivanka Trump also shared her concerns on Twitter. Back in 2016, Eric Trump also received a threatening letter with a nonhazardous white substance. The letter is being investigated by The Secret Service, reports confirm.