Vice President Kamala Harris went to the U.S.-Mexico border soon after she and President Biden took office, even though she had characterized such visits as empty politics just weeks before. President Barack Obama also toured the border during his time in the White House, though he came to see the trips as little more than photo ops.Donald J. Trump used the border when he was president to galvanize support for his anti-immigration policies, even signing his name on his “big, beautiful wall” with a Sharpie pen.As the immigration debate grows increasingly polarized, a trip along the…