Republican Juan Ciscomani will win in his election bid to represent Arizona's 6th Congressional District, ABC News can report, defeating Democrat Kirsten Engel and flipping a House seat for Republicans from retiring Democratic Rep. Ann Kirkpatrick.

With 99% of the expected vote in, Ciscomani is leading Engel by 3,502 votes, 50.5%-49.5%.

Ciscomani, a longtime aide to Republican Gov. Doug Ducey, is seen as a rising star in the Republican Party. He ran a focused campaign — without an endorsement from former President Donald Trump's — on issues including border security, the economy and "conservative family values."

Ciscomani tweeted a thread on Monday accepting victory and thanking Ducey for encouraging him to run and for "being a sounding board through this process"

"In the best country in the world where anything is possible, I am now honored to represent my hometown in the U.S. Congress. I am ready to serve, find solutions for our district's challenges, & be a strong independent voice for our community," he wrote.

He beats Engel, a former Environmental Protection Agency attorney and Arizona state senator, who served just nine months before resigning to run for the vacant seat. Her campaign focused on abortion rights, making for a competitive race in the district which covers most of Pima County, including most of Tucson and Cochise County.

-ABC News' Libby Cathey

Incumbent Republican Rep. David Schweikert will win reelection in Arizona, ABC News can report, projected to defeat Democratic challenger Jevin Hodge and hold a House seat for Republicans.

With 99% of the expected vote in, Schweikert is leading Hodge by 3,008 votes, 50.4% to 49.6%.

Hodge had led Schweikert leading into the weekend, but with larger drops in recent days from Republican areas in Maricopa County, Hodge's odds of overtaking Schweikert faded, along with Democrats' hopes of keeping the House.

This will be Schweikert's seventh term in Congress but his first for District 1 after redistricting. Schweikert fought characterizations of corruption after the House reprimanded him last year for 11 ethics rules violations for improper spending by his office and his campaign. He was fined $50,000 as part of a settlement agreement to end the yearslong probe.

Hodge would have become the first Black Arizonan elected to Congress had he won and is seen as a rising star in the Democratic Party.

-ABC News' Libby Cathey

Democrat Katie Hobbs is projected to win her race against Republican Kari Lake, ABC News reports, flipping the Arizona governor's seat for the first time in more than a decade as midterm voters across the nation appear to have delivered a stunning rejection of election deniers and extremists in midterm contests.

Hobbs, the incumbent secretary of state, cast her matchup with Lake as a choice between sanity and "chaos."

"Do we want to elect a governor whose entire platform boils down to being a sore loser -- or a governor who's going to get the job done for Arizona?" Hobbs said on the campaign trail, calling Lake her "election-denying, media-hating, conspiracy-loving, chaos-causing opponent."

Hobbs served eight years in the Arizona Legislature before being elected secretary of state and gaining prominence in 2020 with her defense of Arizona's voting system against a barrage of baseless fraud accusations that then-President Donald Trump and his allies thrust in the national spotlight.

-ABC News' Libby Cathey

Republican National Committee (RNC) Chair Ronna McDaniel indicated Monday that she'll run for another term atop the GOP.

A source familiar with the matter confirmed to ABC News that McDaniel signaled her reelection bid on a call with members Monday morning, during which she said she would run if party members wanted her to and that she plans to move forward seeking reelection.

Her bid for the chairmanship, which will be decided in January, comes after disappointing midterm election results for the party.

McDaniel has served three terms atop the RNC and was first elected in 2017 with an endorsement from former President Donald Trump.

Should she win reelection, McDaniel would serve as party chair during the 2024 presidential election, which by party bylaws would force her to remain neutral during the race even if Trump, the de facto party leader, runs for a third time.

-ABC News' Will Steakin and Tal Axelrod

Senate Majority Leader Chuck Schumer held a press conference Saturday night at his New York City office to celebrate the projection that Democrats will keep majority control of the chamber.

“This election is a victory -- a victory and a vindication for Democrats, our agenda, and for America and for the American people,” Schumer said.

Schumer credited the win to three things: “terrific” Democratic candidates, the party’s agenda and what he called the rejection of “extremist MAGA Republicans” who were on the ballot this cycle.

"The American people rejected -- soundly rejected -- the anti-democratic, authoritarian, nasty, and divisive direction that MAGA Republicans wanted to take our country in,” Schumer said.