The Congressional Pollinator Protection Caucus, which is an actual thing, held a bipartisan twilight event that involved the release of 50 monarch butterflies into the darkening sky. This was a nice moment. As Rep. Marcy Kaptur, Democrat of Ohio, said, "We should all be able to agree on butterflies." The CPPC is serious business. Between the destruction of monarch habitats ... and the ongoing mystery of colony collapse among the bees, American agriculture is endangered. In 2017, according to the Center For Biological Diversity, the overwintering population of monarchs dropped by a third. The butterfly's dramatic decline has been driven in large part by the widespread planting of genetically engineered crops. The vast majority of U.S. corn and soybeans are genetically engineered for resistance to Monsanto's Roundup herbicide, a potent killer of milkweed, the monarch caterpillar's only food. The dramatic surge in the use of Roundup ... has virtually wiped out milkweed plants in the Midwest's corn and soybean fields. Overall monarchs have declined by more than 80 percent over the past two decades. In the mid-1990s the population was estimated at nearly one billion butterflies, but this year's population is down to approximately 93 million butterflies. The [Trump] administration is determined to defang the Endangered Species Act while a review of the monarch's status under the ESA is pending.