To be eligible to vote early by mail in Texas, you must:
be 65 years or older;
be disabled;
be out of the county on election day and during the period for early voting by personal appearance; or
be confined in jail, but otherwise eligible.
“In 2006, Duval County officials said that nearly half of the ballots cast in that year’s primary — 2,800 out of 5,445 primary votes — were by mail-in ballot. A woman said that her deceased father’s name was among those that showed up on a mail-in ballot.” (They had the largest percentage voter turnout of any county in Texas in 2006! There was no Republican Primary in Duval County that year either.)
Was there a Repub candidate?
If not, someone wasted all that canvassing money.