“4,000 percent increase in fentanyl" under President Biden on the southern border.”
What FactCheck.org found
That was a three-year increase in fentanyl seized between legal ports of entry in the El Paso sector of the border with Mexico. The increase under Biden is 70% when factoring in all seizures at the southern border.
Their words, from the summary they publish with the rating.
In short
Ron Johnson (U.S. Senator) made this claim around 2 June 2022. FactCheck.org (United States) looked into it and published its finding on 8 June 2022, 6 days later. Its rating was “Misleading”.
Ron Johnson has 43 checked claims in this archive. Fact-checking organisations rated 17 of them false or fake, 21 misleading or mixed and 1 true.
This check was done by FactCheck.org, not by DoesItStand. We list it so you can find it. Their full evidence and reasoning are in their article.