Republican primary voters on Tuesday rejected U.S. Sen. John Cornyn, one of the Senate's most senior GOP members, in favor of Trump-backed Texas Attorney General Ken Paxton.

Why it matters: Cornyn's loss marks one of the most significant defeats for a Republican senator in years and underscores how loyalty to President Trump continues to reshape GOP primaries nationwide.

• Trump gave Paxton a last-minute endorsement in the runoff.

What they're saying: "Tonight is the beginning of the fight to preserve every value we hold dear," Paxton told supporters, referring to his upcoming general election campaign against Democrat James Talarico.

• "I've always supported the Republican ticket, and I intend to do so again in this general election," Cornyn told supporters in Austin. "I've said throughout this race that I trust the voters of Texas, and they made their decision."

By the numbers: Paxton won 64% of the vote compared to Cornyn's 36%, according to unofficial results.

• The AP called the election in favor of Paxton an hour after polls closed Tuesday.

Zoom in: Paxton successfully cast the race as a referendum on the party establishment, energizing grassroots conservatives while dodging concerns about the legal scandals and impeachment fight that dogged much of his tenure as attorney general.

• The race became one of the country's most closely watched Senate primaries, fueling millions in fundraising and outside spending.

What we're watching: Cornyn and his supporters warned that the outcome could complicate Republicans' efforts to hold the seat in November against Talarico, a state representative from Austin.

• Paxton's win gives Democrats a potentially more polarizing Republican opponent than Cornyn.

Reality check: A Democrat hasn't won a statewide office in Texas in more than three decades.

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Former U.S. Rep. Colin Allred has won the Democratic runoff against U.S. Rep. Julie Johnson in the 33rd Congressional District.

Why it matters: The Democrats faced off in a reshaped district after North Texas lost a Democratic-leaning congressional district under last year's GOP-led redistricting process.

• Johnson currently represents the 32nd District — Allred's previous seat — but after it was redrawn to lean Republican, she decided to run in the 33rd.

Driving the news: Allred tallied 53.8% of the vote and Johnson 46.2%, according to unofficial results.

• The winner will face Patrick David Gillespie who defeated John Sims in the Republican runoff.

State of politics: Redistricting forced Democratic politicians to play musical chairs before the March primary election.

• Allred initially filed to run for U.S. Senate but dropped out of the race and decided to run for U.S. House.
• U.S. Rep. Marc Veasey currently represents the 33rd District, but the newly redrawn district no longer includes his Fort Worth base and he didn't run for reelection.

The intrigue: U.S. Rep. Jasmine Crockett campaigned for Allred, while Texas state Rep. James Talarico backed Johnson.

• Talarico defeated Crockett in March for the Democratic nomination for U.S. Senate.

Zoom in: In the 32nd District — which now stretches into East Texas — Republican Jace Yarbrough will face Democrat Dan Barrios in November.

State Sen. Mayes Middleton of Galveston defeated U.S. Rep. Chip Roy in the GOP runoff for Texas attorney general Tuesday night.

Why it matters: Middleton successfully cast himself as the MAGA candidate, even as Trump didn't endorse in the race.

• He will face state Sen. Nathan Johnson (D-Dallas), who won the Democratic runoff on Tuesday, per the AP.

Catch up quick: The candidates are running to replace Paxton.

Zoom in: Middleton garnered 55% of the vote. Roy won 45%.

🚂 Railroad commissioner: Tarrant County GOP chair Bo French (50.6%) edged out incumbent Jim Wright (49.4%) in the GOP runoff for Railroad commissioner. He will face state Rep. Jon Rosenthal, D-Houston, in November.

• The position manages the state agency that regulates the oil and gas industry in Texas.

🛜 American Airlines is planning to add Elon Musk's Starlink for wifi on some of its planes next year. (DMN)

⚽️ Juventus FC midfielder Weston McKennie, who grew up in Little Elm, has been selected to the U.S. World Cup roster for the second time. (FOX4)

🗳️ More people voted in the Republican primary runoff than in the Democratic runoff during early voting in Dallas County. (KERA)

If you can't go to Costa Rica to zip line the cloud forest this summer, don't worry, just go to Arlington.

State of play: More Americans might be skipping summer vacations this year, but there are still plenty of adventures near home.

• A zip lining course at River Legacy Park East gives you the chance to fly over the Trinity River.

What to expect: A lot of screams depending on how afraid of heights you and your loved ones are.

• Also, you may end up with a few bumps and bruises from hurtling into obstacles throughout the course.

How it works: Visitors are fitted with a harness and then given a tutorial on how to attach and detach from the zip lines.

• There is a lower level obstacle course through the trees to climb across with short zip lines at the end.
• A taller obstacle course takes visitors over the river.
• You'll be balancing on hanging beams, climbing rope ladders and navigating rocking wooden bridges.

Pro tip: Wear boots or sturdy shoes. Long pants or leggings can help you avoid scrapes. Take gloves.

Where: Go Ape, 1601 NE Green Oaks Blvd. in Arlington

Cost: $49.95 per person.

Six-word review: Three hours feeling like a kid.