By Jesus Mesa
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Two years after Republicans made historic gains along the U.S.-Mexico border, a person can now walk from Canada to the Gulf of Mexico without ever leaving a Democratic congressional district.
The route starts in Blaine, Washington, a small city on the British Columbia line, and ends around Corpus Christi, Texas. It follows the Pacific Coast through Washington, Oregon and California, cuts across southern Arizona and New Mexico, then tracks the border through West and South Texas down to the Gulf.
Measured in straight lines between towns along the corridor, the trip comes to about 2,700 miles, according to a Newsweek estimate. On actual roads and trails, a walker would cover something closer to 3,000.
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The corridor is now possible following the GOP's historic loss in Tuesday's midterm elections. Democrats have won 253 House seats, a net gain of 41, with 21 races uncalled as of Friday afternoon, according to Associated Press results.
Several districts on the route were in Republican hands until this week, and two of them, in southern Arizona and West Texas, filled holes that had split the line.
Down the Pacific Coast
Western Washington is blue from Blaine through Seattle, Tacoma and Olympia all the way to the Columbia River.
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Republicans made a real play for one stretch of it and lost. In the 3rd District, in the state's southwestern corner, Democratic Representative Marie Gluesenkamp Perez won a third term over Republican state Senator John Braun. President Donald Trump carried the district three times.
Over the river, the walk goes through Portland and down the Willamette Valley. Inland southern and eastern Oregon still vote Republican, which keeps the route hugging the coast until California.
California carries the longest leg, and last year's redistricting fight left the state's map bluer. Voters there approved new Democratic-leaning districts to counter the mid-decade redraw by Texas Republicans.
Democrat Mike McGuire beat Republican Representative James Gallagher in the 1st District. Gallagher had only won the seat in a June special election after Republican Representative Doug LaMalfa died. Farther south, Marni von Wilpert took the 48th District, the fifth California House seat to flip from Republican to Democratic.
From Southern California, the route bends east through the Imperial Valley and crosses the Colorado River into Arizona near Yuma.
The Arizona Link
Arizona is where the corridor used to break.
Most of the state's House map is still red. What keeps the walk going is a strip of Democratic districts along the southern border, starting with Democratic Representative Adelita Grijalva's 7th District, which was called shortly after polls closed on Tuesday.
East of Tucson sat the problem. The 6th District runs from the Tucson suburbs to the state's southeastern corner on the border, and JoAnna Mendoza, a Democrat, unseated two-term Republican Representative Juan Ciscomani there.
She led 53 percent to 45 percent when the race was called. Trump won the district by under a point in 2024, and Ciscomani held it that year 50 percent to 47.5 percent.
Into New Mexico and West Texas
Every House district in New Mexico is Democratic. In the south, Democratic Representative Gabe Vasquez held the 2nd District against Republican Greg Cunningham, in a seat Trump carried two years ago.
After El Paso comes Texas' 23rd District, the second hole Democrats plugged.
Republicans had held the sprawling seat, which reaches from part of San Antonio out along the border, since 2015. It opened up when Republican Representative Tony Gonzales resigned in April while facing an expulsion vote over an affair with a staffer.
Katy Padilla Stout, the Democrat, won it 52 percent to 44 percent over Brandon Herrera, a Trump-endorsed gun rights YouTuber. Before Election Day, both The Cook Political Report and Sabato's Crystal Ball had the race leaning Republican.
South Texas and the Gulf
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The final stretch follows the Rio Grande, through districts Republicans redrew last year hoping to pick up seats.
Democratic Representative Henry Cuellar, whom Trump pardoned in December 2025, won again in the redrawn 28th District around Laredo. Further down the river, Bobby Pulido, a Latin Grammy-winning Tejano singer, ousted Republican Representative Monica De La Cruz in the 15th District with roughly 62 percent of the vote.
The walk hits saltwater in the 34th District, which stretches from Corpus Christi to Brownsville and was one of five districts Republicans went after in redistricting. Democratic Representative Vicente Gonzalez kept it, beating Republican Eric Flores.
The new Texas map had pushed five Democratic districts toward Republicans based on 2024 presidential results. The GOP flipped one of them, the Dallas-area 32nd, where Republican Jace Yarbrough won.
A Reversal Along the Border
Much of the corridor passes through heavily Latino communities, the same places where Republicans broke through in 2024.
Latino voters backed Democratic House candidates by 9 points that year and by 30 on Tuesday, according to the AP Voter Poll. Among Latino men, a Republican edge of 8 points turned into a Democratic margin of 19, a 27-point swing.
The comparison sets the 2024 exit poll against this year's AP Voter Poll. They use different methods and capture different electorates, so the swings are estimates.
"You saw in 2024, all the Latino communities moved to the right," Mike Madrid, Republican strategist who studies the Latino vote, told Newsweek. "In 2026, all of the Latino communities moved to the left."
It went up the ballot as well. In Texas, Democrat James Talarico beat Ken Paxton for the Senate and Gina Hinojosa ousted Governor Greg Abbott. Before Tuesday, no Democrat had won a statewide race in the Lone Star State since 1994.
Mendoza, Stout and Pulido take their seats when the new Congress convenes in January.
Newsweek’s reporters and editors used Martyn, our AI assistant, to produce this story. Learn more about Martyn here. Contact Newsweek editors on this story: Jason Lemon and Edward T. Cummins
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