Republican lawmakers in New Mexico have filed a lawsuit seeking to stop a county clerk from issuing marriage licenses to gay and lesbian couples.

According to the AP, the action targets Dona Ana County Clerk Lynn Ellins, whose office has issued more than 200 marriage licenses to gay couples since last week.

Five additional counties have followed Ellins' lead, most of which acted on court orders.

(Related: 6 New Mexico counties issue marriage licenses to gay couples, cover 56% of state.)

The Republican lawmakers argue that Ellins exceeded his powers in issuing the licenses.

He “has violated the New Mexico Constitution's separation of powers doctrine by determining on his own which laws he will enforce based upon his interpretation of the statutes and constitution,” the lawsuit states.

New Mexico State Senator William Sharer is spearheading a broader GOP effort to block all six counties from issuing such licenses. In 2011, Sharer sponsored a failed attempt to define marriage as a heterosexual union in the New Mexico Constitution.

He's previously said that more than two dozen GOP lawmakers are involved in the lawsuit.

“It has to do with a county clerk cannot make law. That is the Legislature's job,” said Sharer

(Related: New Mexico GOPer William Sharer: Gay men stop “whoring,” marry women.)

In announcing his decision, Ellins, a lawyer, said that he had concluded that the “state's marriage statutes are gender neutral and do not expressly prohibit Dona Ana County from issuing marriage licenses to same-gender couples.”