Along the Texas-Mexico border, Democrats defect over immigration concerns | The Texas Tribune
The shift in allegiance is being replicated across the Texas-Mexico border and is encouraging for Republicans who are campaigning on border security and making a big push to win over Hispanic voters. It is also concerning for Democrats who have long held sway in these border and South Texas communities.
In 15 counties along the Texas-Mexico border, participation in Republican primaries has grown steadily since 2014. That year, 23,243 voters participated in a Republican primary, accounting for about 2% of voters. This year, 54,085 voters cast ballots in the GOP primary, making up 4% of voters.