WASHINGTON — Vice President Kamala Harris will travel to the U.S.-Mexico border on Friday, amid mounting criticism from Republicans that neither she nor President Joe Biden has traveled to the country's southern border.

Harris will travel with Homeland Security Secretary Alejandro Mayorkas, according to two people familiar with the trip, who spoke on the condition of anonymity to discuss a trip that is not yet public. The White House declined to comment.

In March, Biden tasked Harris to lead the administration's efforts to address the root causes of migration from the Northern Triangle region. Harris traveled to Guatemala and Mexico earlier this month to meet with leaders and community groups as part of that work, but Republicans assailed her for declining to visit the border.

Harris's trip will come just two days before former President Donald Trump joins Texas Gov. Greg Abbott, a Republican, at the border.