The Supreme Court has sided with the maker of Roundup weedkiller, blocking thousands of lawsuits alleging it failed to warn users the product could cause cancer. The decision Thursday is a victory for the Trump administration but could complicate relations with allies who want to limit pesticide use. The court ruled that federal regulations finding a cancer link unlikely protect the company from state lawsuits. The case was brought by John Durnell, who developed cancer after using Roundup for over 20 years. Roundup manufacturer Bayer disputes the cancer claims but has set aside billions of dollars to settle cases. The debate over glyphosate and its safety continues.