By Ted Hesson and Maria Alejandra Cardona
QUEMADO, Texas (Reuters) -Hundreds of protesters from around the U.S. flocked to a Texas border town on Saturday to vent over illegal immigration and show support for former President Donald Trump at a rally that blended border politics with religious rhetoric.
At the rally in Quemado, Texas, vendors sold shirts, flags and hats promoting the Republican former president while conservative speakers touted conservative Christian values and criticized the border policies of President Joe Biden, a Democrat.
"Folks, this is serious stuff, this is evil stuff" U.S. Representative Keith Self said of Biden's policies. "We are in a spiritual battle for the survival of our Republic."
Immigration has become a potent political issue in the run-up to Nov. 5 elections that will likely pit Biden versus Trump, reprising the 2020 contest.
Trump has motivated his voting base with calls for more restrictive border practices. His critics worry such policies and events such as a convoy that preceded the rally could stoke tensions.
Eagle Pass, 20 miles (32 km) south of Saturday's rally, has achieved national prominence in recent months. Texas Governor Greg Abbott, a Republican, has clashed with Biden over the state's aggressive tactics to deter crossers, including troops, concertina wire and a floating buoy barrier in the Rio Grande.
Abbott and 14 other Republican governors plan to hold a press conference in the city on Sunday to defend the approach.
Reuters witnesses saw small groups of migrants on Friday and Saturday who crossed the Rio Grande near Eagle Pass trapped by concertina wire on the riverbank as they waited for help.
While Saturday's rally proceeded peacefully, the FBI identified a threat to a migrant processing center in Eagle Pass, leading U.S. border officials to evacuate it in recent days, two sources familiar with the matter said, requesting anonymity to discuss internal information.
"Any threat like that is a significant concern," a U.S. Customs and Border Protection (CBP) official told Reuters.
The agency was able to relocate the migrants with relative ease since border apprehensions have fallen sharply in the area over the past month, the official said.
The FBI declined to comment, referring the matter to CBP.
Biden on Saturday afternoon discussed border challenges with Mexican President Andres Manuel Lopez Obrador and committed to continuing "joint efforts to counter transnational criminal organizations involved in the illicit trafficking of drugs, guns, and people," the White House said in a statement.
The "Take Our Border Back" protest began with a vehicle convoy from Virginia that rolled into Quemado on Friday night.
Dennis Barnd, 61, drove with his wife from Ohio to Texas to link up with a convoy in part because of its conservative Christian message.
"I live in a remote part of the country where there's not a lot of activism and whatnot, and it's moving to see so many people come together with a good common cause," he said.
Adam Chavin, 39, donning a shirt bearing Trump's likeness, flew in from Nashville, Tennessee.
"I'm actually trying to do stuff," he said. "I'm not just someone talking, someone posting comments on the internet."
Anna Gabriela Derbez, a 56-year-old Eagle Pass resident at the border event, said immigration was one of several issues - including COVID-19 vaccines, artificial intelligence and LGBTQ education - that were part of "a fight of good versus evil."
"We're for immigration," said Derbez, whose grandparents came to the U.S. from Mexico. "Legal immigration, you know, good immigration, people that are coming and want to work and better a place."
Smaller events were planned in Yuma, Arizona, and San Ysidro, California.
On Thursday, conservative personalities Sarah Palin, a former Republican vice presidential candidate, and Ted Nugent, a rock musician and outspoken gun rights proponent, joined the protest as the convoy overnighted further north in Dripping Springs, Texas.
Nugent called Biden a "devil-scum snake" in a caustic speech before performing the U.S. national anthem on guitar.
Minnesota-based pastor Doug Pagitt tried to enter the rally site on Friday after stopping in the area as part of a tour to combat what he calls "Christian nationalism," but was denied entry as participants told him "you're not wanted."
"We want to engage," Pagitt said afterward.
The number of migrants arrested trying to cross the U.S.-Mexico border has climbed to record highs since Biden took office in 2021. While migrant arrests spiked in December, they have dropped steeply in the past month.
Internal CBP statistics reviewed by Reuters showed 216 migrant arrests on Tuesday across the entire Del Rio Sector, which covers a 245-mile (400-km) stretch of the Rio Grande and encompasses Eagle Pass. In mid-December, that figure at times topped 4,000 per day, internal figures show.
U.S. officials have cautioned the slowdown could be seasonal although the Mexican government also increased enforcement.