Iowa House Mulls Bill to Shield Roundup Lawsuits

Legislation would block suits alleging cancer if pesticide label follows federal rules

Published on Feb. 24, 2026

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Iowa lawmakers are considering a bill that would prevent lawsuits alleging the weedkiller Roundup causes cancer, as long as the pesticide's label follows federal guidelines. The Republican-controlled state Senate passed a similar measure last year, and GOP leaders in the House say they are weighing the issue.

Why it matters

The proposed legislation reflects an ongoing debate over the safety of glyphosate, the main ingredient in Roundup. Thousands of lawsuits have accused the herbicide of causing cancer, though its manufacturer Bayer maintains it is safe when used as directed. This bill could limit the ability of Iowans to seek damages if they believe Roundup harmed them.

The details

The Iowa House is considering a bill that would block lawsuits alleging Roundup causes cancer, as long as the pesticide's label adheres to federal guidelines. This comes after President Trump invoked the Defense Production Act to ensure a steady supply of glyphosate, Roundup's key ingredient. Iowa is home to a major Roundup production plant, with 70% of North American supply coming from the Muscatine facility.

  • The Iowa Senate passed a similar Roundup protection bill last year.
  • The 2026 legislative session in Iowa is currently underway.

The players

Pat Grassley

The speaker of the Iowa House of Representatives.

Bobby Kaufmann

The House Republican Leader in Iowa.

Mike Klimesh

The Senate Majority Leader in Iowa.

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What they’re saying

“My understanding is the president wants to see these products made in America, kind of something we've been talking about.”

— Pat Grassley, Speaker of the Iowa House (kbur.com)

“I hope the House G-O-P takes action this year.”

— Mike Klimesh, Senate Majority Leader (kbur.com)

What’s next

The Iowa House will decide whether to pass the Roundup protection bill during the current legislative session.

The takeaway

This proposed legislation reflects the ongoing debate over the safety of glyphosate, the main ingredient in Roundup. While the manufacturer maintains the herbicide is safe, thousands of lawsuits have alleged it causes cancer. The bill could limit Iowans' ability to seek damages if they believe Roundup harmed them.