Election updates: Mixed results for Trump-backed candidates in GOP primaries

Polls have officially closed in North Carolina, where voters are picking their party’s nominees for the Senate and House elections.

The battleground state presents a key opportunity for Democrats to possibly pick up another seat in the chamber as Republican Sen. Richard Burr retires this year. Former North Carolina Supreme Court Justice Cheri Beasley is seen as the presumptive frontrunner for the Democratic nomination, while there are three standouts in the Republican field: Rep. Ted Budd, former Rep. Mark Walker and former Gov. Pat McCrory. Budd was endorsed by Trump earlier this year.

Another test of Trump’s influence will be in North Carolina’s 11th Congressional District and 13th Congressional District, where he’s backed two 26-year-olds: Rep. Madison Cawthorn, widely known across the country for his scandals and irreverent attitude, and Bo Hines, a former college football star with little name recognition running in a district he doesn’t live in.

Candidates will need to receive more than 30% of the vote to become the party’s nominee or face a runoff election on July 26.

The Lancaster County Board of Elections on Tuesday reported issues with its mail-in ballots, stating that a mistake by a vendor left it unable to scan thousands of ballots because it printed them with the wrong identification codes.

County officials called the error "unacceptable."

"About 22,000 mail ballots were printed by the print vendor with the incorrect code and could not be read by the county’s scanners," the secretary of state's office told ABC News. "County election officials will re-mark the ballots by hand and then scan them. This is allowed under [Pennsylvania] law. It is likely to take county officials a few days."

It’s unclear how the glitch will impact the election. Polls close at 8 p.m. ET in the state, where voters are choosing their party’s nominees for Senate and governor.

The first poll closure of the night comes in Kentucky, where Republican Sen. Rand Paul is seeking a third term and ABC News projected he will win the GOP primary.

Paul has garnered national recognition for his libertarian-leaning views and recently made headlines for single-handedly delaying a $40 billion aid package for Ukraine, which ultimately passed with bipartisan support. Five other Republicans had challenged Paul in the primary race, though he was expected to easily clinch the nomination and win the general election in November.

On the Democratic side, ABC News projected Sen. Charles Booker would win the Senate primary.

Booker rose to prominence in the 2020 election cycle when he nearly upset a well-funded, establishment-backed Democratic rival in a Senate primary to challenge Republican leader Mitch McConnell.

Pennsylvania Lt. Gov. John Fetterman, the front-runner in the state's Democratic Senate primary race, has completed a "successful procedure" to recieve a pacemaker and defibrillator, his campaign said Tuesday, after he suffered a stroke late last week.

"John Fetterman just completed a successful procedure to implant a pacemaker with a defibrillator. The procedure began at 3:15pm, John was released at 5:56pm, and he has been given the all-clear that it was successful. He is resting at the hospital and recovering well. John continues to improve every day, and he is still on track for a full recovery," the campaign said in a statement.

Dr. Jay Bhatt, an internal medicine physician, instructor at the University of Illinois School of Public Health and ABC News Contributor, said the procedure to implant a defibrillator and pacemaker are "common but carry risks of infection, bleeding, and complications and inappropriate shocks from the defibrillator."

A day after Fetterman announced his stroke, his team said that he would not be attending his election night party and would remain in the hospital. His wife, Gisele, will speak in his place. His campaign released a photo Tuesday morning of Fetterman voting with an emergency absentee ballot from the hospital, where he is recovering.