The gop achieved their most impressive gains in 1998 with the election of and only republicans holding statewide executive and judicial offices.

That happened since the election of Bill Clements.
Bill clements was the first republican candidates who ever won the position as Texas Governor.  He is considered as a man that contributed the most for the development of modern-day texas. As a form of respects, many Streets, hospitals, buildings, and schools are attributed to his name.