The ballot box showdowns this month that you need to watch

After a month on the sidelines, the 2026 primary season is back with a vengeance.

Indiana and Ohio kick off the action on May 5, with Nebraska and West Virginia holding primaries a week later, on May 12. Louisiana's nominating contest follows on Saturday, May 16. Three days later marks the busiest day of the month, with Alabama, Georgia, Idaho, Kentucky, Oregon and Pennsylvania holding primaries. Texas wraps up May with runoff showdowns on May 26.

Here's a closer look at some of the top races.

Five months ago, Republicans in the GOP-dominated state Senate withstood immense pressure from Trump and his allies and voted down congressional redistricting, which would have given solidly red Indiana two more right-leaning U.S. House seats ahead of the midterms. Seeking retribution, the president endorsed challengers to eight GOP state senators who voted against the redistricting bill.

The intra-party battle is seen not just as a test of fealty to Trump but rather a fight between MAGA forces and more traditional conservatives for the future of the GOP.

"We've got to change those old-style Republicans, put in people who will fight, fight against the Democrat gerrymandering," Club for Growth President David McIntosh told Fox News Digital.

McIntosh, a former congressman from Indiana, said, "I want to see my state do the right thing."

Once a top general election battleground state, Ohio has shifted to the right over the past decade, with Trump carrying the state by 11 points in the 2024 election. But this year's races for the Senate and governor are expected to be very competitive. And the Senate race is one of a handful across the country that may determine if the GOP holds the majority or if the Democrats flip the chamber.

Cassidy was one of only seven Senate Republicans who voted in early 2021 to convict Trump after he was impeached by the House for his role in the violent Jan. 6 attack on the U.S. Capitol by supporters who aimed to upend congressional certification of former President Joe Biden's 2020 election victory. Trump was acquitted by the Senate.

But since the start of Trump's second term 15 months ago, Cassidy has been supportive of the president's agenda and his nominees.

If no candidate cracks 50% of the primary vote, the top two finishers will face off for the nomination in a June 27 runoff election.

Massie has long been one of Trump's most vocal GOP critics in Congress, repeatedly taking aim at the president over the Epstein files and foreign policy.

Trump allies have spent big bucks to boost Gallrein, a former Navy SEAL, and to take aim at Massie.

Trump has endorsed Lt. Gov. Burt Jones, who is trading fire in a competitive and combustible battle with healthcare executive and mega GOP donor Rick Jackson, who has infused millions of his own money in his bid. Among the others battling for the nomination in a crowded Republican field are state Attorney General Chris Carr and Georgia Secretary of State Brad Raffensperger.

Former Atlanta Mayor Keisha Lance Bottoms, who later served in then-President Joe Biden's administration, is the frontrunner for the Democratic nomination. Among the other contenders in the crowded field of candidates are Mike Thurmond, a former DeKalb County CEO and former state labor commissioner, and former Republican lieutenant governor turned Democrat Geoff Duncan.

Republicans are hoping to flip the U.S. Senate seat up for grabs this year in Georgia. The GOP views first-term Sen. Jon Ossoff as the most vulnerable Senate Democrat seeking re-election this year. But beating Ossoff, who has built a massive war chest, won't be easy in the southeastern battleground state.

Making matters worse for the GOP: There's a nasty primary between major contenders Reps. Mike Collins and Buddy Carter, and former college football coach Derek Dooley, who is backed by Kemp. Trump has remained neutral to date in the Senate primary in Georgia.

Longtime GOP Sen. John Cornyn is fighting for his political life as he faces off in a runoff election against state Attorney General Ken Paxton, who is a MAGA firebrand and major Trump supporter.

Trump has stayed neutral in the showdown between the two Republican titans in right-leaning Texas.

Democrats are confident, and Republicans are concerned, that if Paxton wins the GOP nomination, Republicans will have a harder time in the general election holding the seat. And similar to the Senate race in Ohio, the showdown in Texas is one of a handful across the country that may determine if the GOP holds the majority.