Tuesday is a big primary day. Here's what you need to know

By Stephen Fowler , The NPR Network Voters cast their ballots at South Oldham Middle School on May 19 in Crestwood, Ky. Skip to a specific state: Alabama | Georgia | Idaho | Kentucky | Oregon | Pennsylvania Redistricting efforts across the South continue following the SCOTUS ruling which is making Alabama's primary a bit confusing. Primaries for 1st, 2nd, 6th, 7th Congressional Districts have been rescheduled. Primaries for the 3rd, 4th and 5th Congressional Districts continued as planned. The primaries also decided the matchup to replace term-limited Republican Gov. Doug Jones. State officials said Democrats accounted for roughly 53% of the primary ballots compared to 45% for Republicans, with the rest comprising nonpartisan-only contests. Many of the top races are likely to head to runoffs, including the Republican race to face incumbent Democratic Sen. Jon Ossoff in one of the most competitive U.S. Senate races in the country. Democrats and Republicans will also pick their nominees to replace term-limited Republican Gov. Brian Kemp in what is expected to be another expensive, closely watched race this November. Billionaire health care executive Rick Jackson and Trump-endorsed Lt. Gov. Burt Jones will face off June 16 in a runoff for the Republican governor's race nomination, according to an Associated Press race call. The winner will face former Atlanta Mayor Keisha Lance Bottoms, who clinched the nomination outright, according to the Associated Press. A pair of state supreme court races will be decided on Tuesday, as Democrats look to unseat two incumbents appointed by Republicans in contests that have taken on heightened attention following the U.S. Supreme Court's recent decision weakening part of the Voting Rights Act. Read: These men voted for President Trump. As Boise State Public Radio's James Dawson reports, all state representative and state senator races are on the ballot, as are key congressional positions. In Kentucky, the crowded primary of Democrats trying to flip Sen. Mitch McConnell's seat squared off. As Louisville Public Media's Sylvia Goodman explains a Democrat has not represented the state in the U.S. Senate in over 25 years. In one of the first calls of the night, U.S. Rep. Andy Barr won the Republican nomination for the seat after receiving the president's endorsement earlier this month, according to a race call by The Associated Press. He will face former state Rep. Charles Booker, who lost to incumbent Sen. Rand Paul in 2022. In addition to the race to see who will replace McConnell, incumbent Rep. Thomas Massie lost his primary challenge from Trump-backed Ed Gallrein. Related: Massie or Gallrein? On Tuesday, Oregonians will nominate gubernatorial candidates and decide the fate of proposed gas taxes. As OPB's Dirk VanderHart reports, due to the state's closed primary system, "a plurality of the state's registered voters will have no say in those contests until the November general election." Democratic Gov. Tina Kotek is facing primary challenges, in addition to the GOP race to decide who will be on the ballot in November. Pennsylvania is home to at least three competitive races that could help decide the balance of the power in the House this fall. As WHYY's Carmen Russell-Sluchansky reports, Philly's 3rd Congressional District Democratic primary has seen division between the candidates over Gaza and fundraising, despite the three candidates' policy positions being very similar. State Rep. Chris Rabb, the race's progressive insurgent, won the primary, according to an Associated Press race call. Related: Some Trump-voting Catholics in Bucks County express buyer's remorse over papal dispute Related: The 'political outsiders' who want Pa. Sponsor Message Become an NPR sponsor