The letter had reportedly been mailed from Hong Kong.
President Obama was at the center of an Anthrax scare after white powder was mailed to his offices in Washington Tuesday.
Just a day after his official portrait was unveiled, police responded to reports of a white powder found in a letter that had been sent to his office in the nation's capital.
The letter, mailed from Hong Kong, reportedly contained baby powder.
The scare comes on the heels of a similar threat involving President Trump's daughter-in-law in New York Monday.
Vanessa Trump, the wife of Donald Trump Jr., was hospitalized after a letter was mailed to her mother’s Upper East Side residence and addressed to the president’s eldest son. The postmark showed that the letter originated from Boston.
Vanessa, a mother of five, opened a letter containing what turned out to be corn starch. She was taken to the hospital as a precaution.
The letter also contained a disturbing note to Donald Jr. that reportedly read: “You’re an awful person and now you get what you deserve,” a source told the New York Daily News.
On Monday, Vanessa thanked responding authorities on Twitter.
Her husband also thanked authorities after the situation received the "all-clear."
His sister, Ivanka, sent her support to her family.
Vanessa, her husband, and their children were surrounded by security as they were pictured on a stroll in New York City Tuesday.
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