This is a historic election that could transform the entire country. But as CGTN's Alasdair Baverstock reports, for some voters, their political vision has hit a wall. And it runs along the northern border with the US.

At the border with the U.S., the traffic is coming back into the country. Thousands of voters with dual nationality have crossed into Mexico to cast their votes in the presidential race.

JORGE PARRA DUAL NATIONALITY VOTER "I drove all the way from Los Angeles to vote. To make possible a good change for my people."

GONZALO CORTES DUAL NATIONALITY VOTER "I just crossed the border from San Diego to Tijuana to vote."

Tijuana's border with the United States is the busiest international crossing in the western hemisphere and for many dual-nationality voters, the forced nature of the cross-border life is their primary reason to vote.

GONZALO CORTES DUAL NATIONALITY VOTER "The people from San Diego they want to bring more work, more jobs, better pay, and better salary, you know, If the people had better pay, they aren't going to cross the border to the United States, they want to stay here, you know, because they want to feed their families."

Yet in Tijuana, another group is standing by to have its say, in a state where over thirty-three percent of America's deportations are conducted.

ALASDAIR BAVERSTOCK TIJUANA, MEXICO "Situated at the U.S.- Mexico border, Tijuana is also home to a large number of U.S. deportees. They are a community that counts themselves among Mexico's most marginalized, and for many of them, it will be their first time voting in an election."

Luis Rivera says he wants to see his fellow deportees involved in the democratic process.

LUIS RIVERA US DEPORTEE "Right now, when they see our votes, they see our names and they look up who we are, and they can see, ok, this is a deportee vote. We took the time to get up, think about our city where we live and try to make it better. That's where they're gonna see that we're actually doing something about it. We're not screaming, we're not starting riots, all we're doing is participating with them to make this vote go through."

As Tijuana has its say Mexico's future, many of its voters will depend on how the country's next president handles the worsening relationship with its northern neighbor.

And whoever wins the election, it will be here, where improving U.S.-Mexico cross-border relations will play out. Alasdair Baverstock, CGTN, Tijuana, Mexico.