Trump’s net approval rating (approval – disapproval) among registered voters has been slightly negative in Texas throughout his presidency. The latest Quinnipiac University poll put it at -1 points. All other elected Texas Republican officials had at least a +8 point net approval rating. This poll comes on top of the 2018 exit poll giving Trump a +1 net approval rating, and the midterm electorate in Texas is likely more Republican leaning than a 2020 presidential electorate will be. Trump won the state by 9 in 2016.
If the 2020 election were held today and it were solely a referendum on Trump, Texas would be a toss-up.
Traditionally, Texas has been a lot more Republican than the nation as a whole. In 2014, for example, Democratic President Barack Obama’s net approval rating was 18 points worse in Texas than nationally. In 2018, Trump, a Republican, was just 10 points higher in Texas. In other words, there was an 8-point shift toward the Democrats, on this measure, compared to the nation as a whole in just four years. This followed the 2016 presidential race being the closest in the state since the 1990s.