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Wisconsin Watch partners with Gigafact to produce fact briefs — bite-sized fact checks of trending claims. Read our methodology to learn how we check claims.

Yes.

More than 90% of illegal fentanyl confiscated in the United States is seized at legal ports of entry, such as airports or monitored border crossings, according to the U.S. Department of Homeland Security.

Cartels try to smuggle fentanyl mainly in vehicles driven by U.S. citizens, the department says.

Fentanyl is approved by the U.S. Food and Drug Administration for pain relief. Often abused, it is 50 times more potent than heroin.

Synthetic opioids — mainly fentanyl — account for about 70% of the estimated 100,000 fatal drug overdoses in the U.S. annually.

In Wisconsin, synthetic opioid deaths set records under former President Donald Trump and under President Joe Biden. They reached 1,337 in 2022 before dropping to around 1,300 in 2023.

U.S. Sen. Tammy Baldwin, D-Wis., who is running for re-election Nov. 5, 2024, against Republican Eric Hovde, alluded to the 90% statistic Sept. 5.

This fact brief is responsive to conversations such as this one.

Sources

Homeland Security Department: Study in the States

U.S. Department of Homeland Security: Fact Sheet: DHS is on the Front Lines Combating Illicit Opioids, Including Fentanyl

Wisconsin Watch: Does fentanyl kill more than 100,000 Americans every year?

River Channel: 2024 Western Wisconsin Journal: U.S. Senate Candidate Tammy Baldwin (D)

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Tom Kertscher joined Wisconsin Watch as a full-time reporter in October 2024. He started as a fact checker in January 2023 and contributes to our collaboration with the The Gigafact Project to fight misinformation online. Kertscher is a former longtime newspaper reporter, including at the Milwaukee Journal Sentinel. He is a contributing writer for Milwaukee Magazine and sports freelancer for The Associated Press.