Will Katherine Aleman, a resident of Horsetown USA, have what it takes to oust GOP Rep. Ken Calvert?

Katherine Aleman is the latest Democrat to enter a crowded field in a marquee California House race.

Katherine Aleman stands for a photo. | Courtesy of Katherine Aleman campaign

In the dusty heart of Southern California’s Inland Empire, in a town known more for horseback trails than political battles, a new contender is emerging in one of the state’s most hotly watched congressional races. Katherine Aleman, a public school teacher, former city councilme…