EL PASO, Texas — Kamala Harris is facing perhaps the most politically challenging moment of her vice presidency during a visit Friday to the U.S.-Mexico border as leader of the Biden administration’s response to a migration spike that’s drawn fire from Republicans and made fellow Democrats uncomfortable.

“I’m glad to be here,” Harris said after arriving into El Paso and plunging into her schedule. “It was always the plan to come here, and I think we’re gonna have a good productive day.”

At a Customs and Border Protection processing center, Harris met with five young girls, ages 9-16, who had been detained after crossing the border, the White House said. She also spoke with agents about how they were using technology to streamline intake for migrants.

“You guys have made incredible advances in the last several months,” she told the agents.

Her schedule includes talks with advocates from faith-based organizations, as well as shelter and legal service providers, after a drop-by at the Paso del Norte Port of Entry.

Harris Facing Criticism for Delayed Trip to Border

But the vice president has faced mounting criticism from members of both parties for declining to make the trip until now and for her muddied explanations as to why.

Republicans seized on the absence of both Harris and President Joe Biden from the border to paint the administration as weak on border security, seeking to revive a potent political weapon against Democrats for the 2022 midterm elections. With former President Donald Trump visiting the area less than a week after Harris, Republicans will be watching the vice president’s visit closely for fodder they can use in political attacks.

Other administration officials have made multiple visits to the border, but the absence of Biden and Harris has left some Democrats worried that damage already has been done. There’s concern that the Biden administration has ceded the border security debate to Republicans.

“The administration is making Democrats look weak,” said Texas Democratic Rep. Henry Cuellar in an interview with The Associated Press. “I’ve heard, from Democrats and Republicans in my area, what the heck is going on with this administration?”

Cuellar’s district spans from south of San Antonio to the U.S.-Mexico border, and last year he won reelection by the slimmest margin of his nearly two-decade-long career. While he says he’s not worried about his own reelection, he adds, “I worry about my colleagues.”

Border Security and Rise in Migrant Numbers

Biden’s first few months in office have seen record numbers of migrants attempting to cross the border. U.S. Customs and Border Protection recorded more than 180,000 encounters on the Mexican border in May, the most since March 2000. Those numbers were boosted by a coronavirus pandemic-related ban on seeking asylum, which encouraged repeated attempts to cross because getting caught carried no legal consequences.

Republicans have seized on those figures to attack Biden and Harris as weak on border security, a message the GOP used with success during the 2020 campaign.

Administration officials, including Harris, have sought to refute the charge, with Harris repeatedly sending the message to migrants during her recent visit to Guatemala: “Do not come.”

But those comments drew fire from some progressives, most notably New York Rep. Alexandria Ocasio Cortez, who called the message “disappointing.”

It was an incident that underscored the political no-win situation for Harris, taking on an intractable problem that’s bedeviled past administrations and been used by both parties to drive wedges and turnout during campaign season. If Biden chooses not to run for a second term, Harris will be seen as the leading contender to replace him, and the immigration issue could become either a chance to showcase her accomplishments or an albatross.

Advisers Say Focus is on Addressing Root Causes

Indeed, Republicans preemptively hammered Harris over her border visit, with Trump claiming credit for her decision to go.

Harris advisers have been careful to emphasize that her main focus is addressing the root causes of migration. She has been seeking economic and humanitarian solutions to improve conditions for residents of Central and North American countries who flee to the U.S. Her aides framed her trip to the border as part of an effort to better understand how to solve the problem.

“What happens at the border matters, and is directly connected to what is happening in Guatemala, El Salvador and Honduras,” said Harris spokeswoman Symone Sanders. “It is directly connected to the work of addressing the root causes of migration.”

Harris was being joined on the trip by Homeland Security Secretary Alejandro Mayorkas, Illinois Democratic Sen. Dick Durbin and Democratic Rep. Veronica Escobar, who represents the district there.

Mayorkas said the U.S. faced “significant challenges” back in March in securing the border but “we’ve made extraordinary progress” that he was hoping to share with Harris Friday.

Harris’ Visit ‘A Day Late and a Dollar Short’

Harris had no plans to visit the migrant detention facility at the Fort Bliss military post, which has drawn criticism from advocates who have described unsafe conditions and allegations of abuse toward some of the thousands of children housed there. Instead, Health and Human Services Secretary Xavier Becerra was set to travel there on Monday.

Democratic Rep. Cuellar called the decision by Harris to visit El Paso “politically safe,” because, he said, most of the activity at the border happens farther south.

Trump said on Friday in an interview with the conservative outlet Newsmax that “I think she should go to the real part of the border, not a part of the border that’s seldom violated.”

The head of a major Latino civil rights group expressed concerns that Harris’s visit was “a day late and a dollar short.”

“It almost feels like they’re being kind of forced into it by the local communities, as well as the Republicans’ political attacks from the right,” said Domingo Garcia, president of the League of United Latin American Citizens.

But, still, Garcia said he was glad she was going, and expressed optimism that her visit could help the Biden administration correct its course on immigration and show a contrast to the Trump administration’s hardline stance.

“They should own this, and they should solve it, because it does need a bipartisan solution,” he said.