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President Trump returning to the White House from Minnesota on Sept. 18. Photo: Win McNamee/Getty Images

A suspect was arrested for allegedly "sending a suspicious letter" after law enforcement agents intercepted an envelope addressed to President Trump containing the poison ricin, the FBI confirmed in an emailed statement to Axios Sunday.

Details: The suspect, a woman, was arrested while trying to enter New York from Canada, law enforcement sources said.

The big picture: The FBI and Secret Service are investigating after two tests confirmed the presence of the toxin following the interception of the mail earlier this week, CNN first reported.

  • All mail addressed to the White House is sorted and screened at an offsite facility before reaching the White House.
  • The Royal Canadian Mounted Police said in a statement it was assisting in the investigation after receiving a "request for assistance from the FBI in connection with a suspicious letter sent to the White House."

What else they're saying: "The FBI and our U.S. Secret Service and U.S. Postal Inspection Service partners are investigating a suspicious letter received at a U.S. government mail facility. At this time, there is no known threat to public safety," the FBI said in an earlier statement.

Go deeper

Wisconsin GOP says hackers stole $2.3 million from account meant to help Trump

Illustration: Aïda Amer/Axios

$2.3 million was recently stolen from a Wisconsin GOP account meant to aid President Trump's re-election campaign, Republican Party chairman Andrew Hitt told the AP on Thursday.

The big picture: Former Vice President Joe Biden is polling ahead in Wisconsin, which is a vital battle ground state in November's election. Although Trump won Wisconsin in 2016, Biden is currently favored to win the state in FiveThirtyEight's latest forecast.

Updated 4 hours ago - World

Mexican President López Obrador tests positive for coronavirus

Mexico's President Andrés Manuel López Obrador during a press conference at National Palace in Mexico City, Mexico, on Wednesday. Photo: Ismael Rosas/Eyepix Group/Barcroft Media via Getty Images

Mexican President Andrés Manuel López Obrador announced Sunday evening that he's tested positive for COVID-19.

Driving the news: López Obrador tweeted that he has mild symptoms and is receiving medical treatment. "As always, I am optimistic," he added. "We will all move forward."

4 hours ago - Politics & Policy

Sarah Huckabee Sanders to run for governor of Arkansas

Sarah Huckabee Sanders at FOX News' studios in New York City in 2019. Photo: Steven Ferdman/Getty Images

Former White House press secretary Sarah Huckabee Sanders will announce Monday that she's running for governor of Arkansas.

The big picture: Sanders was touted as a contender after it was announced she was leaving the Trump administration in June 2019. Then-President Trump tweeted he hoped she would run for governor, adding "she would be fantastic." Sanders is "seen as leader in the polls" in the Republican state, notes the Washington Post's Josh Dawsey, who first reported the news.