Well, even though Texas obviously isn't in more than 71% in we can look at it and see just how far the gap is versus a general election, not even a Presidential one.
2020 D Primary:
Biden - 460,807
Sanders - 436,928
Bloomberg - 241,585
Warren - 177,626
Buttigieg - 78,954
Klobuchar - 40,968
2016 D Primary
Clinton - 936,004
Sanders - 476,547
2016 Presidential Election
Trump - 4,685,047
Clinton - 3,877,868
Johnson - 283,492
2018 Senate Election
Cruz - 4,260,553
O'Rourke - 4,045,632
2016 R Primary
Cruz - 1,241,118
Trump - 758,762
Rubio - 503,055
Kasich - 120,473
Carson - 117,969
Jeb! - 35,420 (Declared Winner)