There’s something different about the crop of Democrats running for Congress in 2018. As in previous years, the party has recruited a small army of veterans in high-profile races and in Republican-held districts. There are loads of state legislators, business owners, and government officials.

But the candidates also include a volcanologist who’s worried that her favorite research spot will be opened up for development, an aerospace engineer who’s running against the climate-denying head of the House Science Committee, a pediatrician who spends part of the year treating leprosy patients in Vietnam, and a physicist who worries what budget cuts would mean to the federal research facility where she spent her career.

All told, more than a dozen Democratic candidates with science backgrounds have announced their candidacies for Congress or are expected to in the coming months. The boomlet of STEM-based candidates amounts to a minor seismic event in a community where politics and research have traditionally gone together like sodium and water. Trump has been in office just six months, but he’s already done something remarkable — he’s gotten scientists to run for office.

The surge of science-based candidates has been aided by a new political outfit called 314 Action, launched last summer […]