and 2012. But you could argue that the most logical candidate, in terms of identity politics, to appeal to white, Christian male voters would be a white Christian male. (Trump ran very strong among white men and white evangelicals.)

Looking forward, this makes the 2020 Democratic field interesting. The well-known white Christian men who might otherwise be logical candidates for the Democrats have some obvious potential challenges. Trump, at age 70, was the oldest person ever first elected president. So California Gov. Jerry Brown, who is 79, and Joe Biden, 74, are facing America’s historic preference for younger candidates. New York Gov. Andrew Cuomo is 59, but liberal activists hate him. Hickenlooper, 65, just has not galvanized party activists so far. Virginia Sen. Tim Kaine, 59, has already saidImporting the equally foreign predators of invasive species to the United States is not a new practice, she said, and it is not limited to insects. Some projects have worked — and some have not.

“It’s an effort that has been going on for a while, and it’s pretty widespread,” Michigan State University entomologist Deborah McCullough said.

In order to fight the problem, researchers looked to the beetle’s native range in Asia to determine its predators and found that parasitic wasps there preyed on the beetle to feed their larvae. The first group of wasps brought from China was released in Michigan in 2007, and since then, some 250,000 wasps from three Asian species have been released in almost 20 states to combat the beetles through biocontrol.

The U.S. Forest Service