Steve King goes down, and other top takeaways from Tuesday's primaries

Iowa Republicans drove Steve King out of office on a primary day marked by civil unrest.

King's defeat was the top headline in Tuesday's primaries. The nine-term congressman with a history of racist and anti-immigrant remarks was ousted after the GOP establishment offered his opponent both material and symbolic assistance.

In other races, Democrats' top recruit for the Iowa Senate race advanced through the primary to set up a competitive general election that could determine control of the chamber. And Valerie Plame, the CIA agent who was outed during the...