Why did a blue Texas border county vote red for the first time in 100 years?

Contributing sentiments towards policy:

46% : Trump has said he would carry out his mass deportation plans -- a top campaign promise -- by declaring a national emergency and using "military assets" to deport migrants currently living in the U.S. without legal permission.
38% : ""But at the same time," he added, "we hope that Trump and his administration do the right thing and focus on the criminal element first, and then see how in the meantime, we'll see how the policies can be implemented in a better way.
23% : MORE: Texas land commissioner offers 1,402 acres to Trump for 'deportation facilities'ABC News' Mireya Villarreal visited Starr County to ask residents what issues and values most influenced them to vote for Republican candidates this year, instead of upholding their century-long blue streak.
21% : In a letter to Trump dated Nov. 19, Buckingham said she's offering the land, located along the border of Mexico, "to be used to construct deportation facilities.

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