Donald Trump gained ground in all four counties on the Arizona-Mexico border. Here's where his margin improved the most.

A review of the 2024 results show that Trump flipped or expanded his lead in several crucial counties. Arizona's most populous county Maricopa, which includes Phoenix, shifted decisively back to Trump ...

But no region on the battleground map is more affected ... counties along Arizona’s southern border, Trump improved on his 2020 performance against Biden. Santa Cruz County, which shares a ...