In 2022, he was a candidate for the District 10 seat in the Texas Senate, which he won unopposed in the general election, due to the democratic opponent dropping out of the race in April 2022.

[6] In the regular and then the three special legislative sessions of 2003, King authored the congressional redistricting legislation favored by the Republican Party,[7] which won more than 55 percent of the total votes cast in thirty-two separate congressional races in the 2002 midterm elections even though the Republican Party obtained just fifteen of the U.S. House seats.

[10][11][6][12] King was involved in other legislative matters, including the testing of high school athletes for steroid use,[11] and methods for preventing the circumvention of the parental notification law by abortion clinics.

[12] King authored a bill in the Texas House, HB 347 of the 86th Session, to ban the process of forced annexation by cities over suburban and rural areas.

He was also an instructor at Dallas Baptist University which is his alma mater, and he served as a justice of the peace in Parker County, Texas.