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 Bush administration, failed to parlay her 2000s-era celebrity and profile into a New Mexico congressional seat.

Meanwhile, the widespread protests over police brutality and the continued coronavirus pandemic changed the way people voted — and offered a hint of what could go wrong in November.

Here are POLITICO's top takeaways from a unique primary night.

Republicans finally dethrone Steve King
After years of answering for Rep. Steve King’s racially insensitive and derogatory rhetoric, House Republicans finally figured out how to give him the boot.

They starved him of cash, deprived him of committee assignments and plied his challenger with outside support. But to avoid antagonizing his legion of loyal supporters, King’s detractors largely ignored his decadeslong list of remarks condoning white supremacists and demeaning immigrants. Instead, they cast him as ineffective and powerless in Washington, unable to achieve results for his constituents.