Which state has a longer border with mexico texas or new mexico

TEXAS.

Explanation:

Texas is a part of the US which is located in the south central of the country. Is has border mostly with rivers. While the Rio Grande is a treaty between the US and Mexico which close to Texas and Mexico, serving as a boundary between the both countries. This treaty that brought about the Rio Grande was as a dispute between the US and Mexico in 1848.

i do believe that its called,(the segovia highlands); plz check first good luck;