https://apnews.com/11649cfa468e49d281d5369cb47c11af > SAN FRANCISCO (AP) — With its stock dropping and more lawsuits expected, Monsanto vowed Tuesday to press on with a nationwide legal defense of its best-selling weed killer Roundup after a San Francisco judge upheld a verdict alleging it causes cancer. > Legal experts said the decision will have little value in courtrooms across the country where similar cases are pending, but it will likely lead to more lawsuits. Similar lawsuits doubled from 4,000 to 8,000 after a San Francisco jury awarded groundskeeper DeWayne Johnson $389 million in August.