SAN ANTONIO — Donald Trump pinatas, with dark suits, oversized pink lips and unruly yellow manes in paper mache, are top sellers across South Texas — a potential sign of trouble for its Republican congressman and some colleagues representing predominantly Hispanic districts across the country.

First-term Rep. Will Hurd is seeking re-election from a constituency that’s nearly 70 percent Hispanic while representing 820 miles of the U.S.-Mexico border, more than any other congressional district.

Trump made a whirlwind trip Wednesday to Mexico, heightening speculation that he might back off promises to build a wall along the 1,989-mile southern border and force Mexico to pay for it. But in a fiery speech in Arizona hours later, Trump insisted again that Mexico would finance the wall and declared that millions of people in the country illegally were violent criminals.

After he doubled down on the issue, some of Trump’s top Latino supporters abandoned their support — including Houston attorney Jacob Monty, a member of his National Hispanic Advisory Council. Trump’s standing with many other Hispanics cratered when he opened his campaign last summer by suggesting that some Mexican immigrants were rapists and drug smugglers.

That was the case in parts of Hurd’s district, which extends from San Antonio across two time zones of sparsely populated countryside to El Paso, a land area of 59,000-plus square miles.

“He insulted Hispanics,” said Sylvia Arriola, a 59-year-old administrator for a San Antonio company providing services to adults with special needs. She said much of the district was territory Mexico relinquished at the end of the Mexican-American War in 1848. “We’ve always been here. This was part of Mexico. We didn’t ‘come’ from anywhere.”

Hurd’s is in Texas’ only competitive congressional district. Since 2008, a Democrat has won the seat during high-turnout presidential elections, only to lose it back to a Republican in the midterms. Hurd beat then-Rep. Pete Gallego two years ago by just 2,422 votes.

Hurd hasn’t endorsed Trump, though he says the billionaire businessman still has about two months to win his vote.

Hurd isn’t alone in seeking to dodge Trump’s electoral shadow. Miami Republican Rep. Carlos Curbelo has vowed not to vote for Trump.

California Republican Rep. Jeff Denham suggested previously that he will back the GOP presidential nominee but since hasn’t said he’ll vote for Trump.