Is she — or is she not — the Dallas County sheriff?

Lupe Valdez says she’s still the top cop in Dallas County, Texas.

She denies reports of her resignation. But she still is thinking about running for Texas governor, as a Democrat. She might challenge Gov. Greg Abbott, the Republican who recently announced his re-election campaign.

I am not going to comment on Sheriff Valdez’s work as Dallas County sheriff, given that I live way up yonder in Amarillo. I would like to offer a brief comment on the reasons she has posited for considering a run for governor.

She has grown weary of Republican dominance of Texas politics.

To be candid, so have I. So have other Texans. Democrats have been yearning for a serious challenger to Abbott in 2018. None has emerged. Valdez might be the one.

Now … before you get on my case for being one of those partisan Democrats who wants to see Republicans toppled at every turn, I want to make an important stipulation.

It is that one-party political dominance — no matter which party is in command — too often produces an arrogance that diminishes the cause of what I like to call “good government.”

I moved to Texas in the spring of 1984. I took up my post as an editorial write — and later editorial page editor — of the Beaumont Enterprise. The Golden Triangle in the early 1980s was still a heavily Democratic bastion. Every elected office belonged to Democrats. And I noted at the time that I believed that good government would do well to see greater Republican challenges of Democratic officeholders.

Sheriff Valdez and I are on the same page. According to the Texas Tribune: “Last month, Valdez told the Tribune she believes it’s “time for a change” in GOP-dominated state government. “Too much of one thing corrupts, and I’m a strong believer in a two-party system,” she said. “I’m hoping that enough people are seeing that too much one-sided is not healthy for Texas.”

Read the Tribune article here.

Healthy challenges force incumbents to defend their record. They must make the case for their re-election. Texas, which once was dominated by Democrats, has totally shifted its political tilt. Republicans have commanded every statewide elective office for more than two decades; the one exception occurred four years ago when Texas Court of Criminal Appeals Judge Larry Meyers switched from Republican to Democrat while he was still in office, only to lose his bid for re-election in 2016.

I hope Valdez runs for governor. I might even vote for her if she wins the Democratic primary and challenges Abbott in the fall of 2018.

If it comes to pass, then let the debate commence.