On Tuesday, four states – Georgia, Kentucky, Idaho, and Oregon – will hold primary contests, including several congressional showdowns that could shape key contests in the autumn battle for control of the House. In addition, a special election in California will determine the successor to former House Speaker Kevin McCarthy. Among the most closely watched races is a county prosecutor primary in Atlanta, where Fulton County District Attorney Fani Willis, who is leading the prosecution of former President Donald Trump in his 2020 election interference case, faces a challenge from attorney Christian Wise Smith. Other key races to watch include the GOP primary for the open seat in Georgia’s 3rd District, where Trump is backing former adviser Brian Jack, and the Democratic primary in Oregon’s 5th District, which is a crucial swing district that could help determine whether the GOP can hold on to its majority. In California, an all-Republican special Congressional election will be held to fill the remainder of Kevin McCarthy’s term in the 20th District.