Republican States are pushing a federal judge to bring to an end what Congress started roughly a year ago, the removal of Obamacare. A three-hour hearing was held in Fort Worth, Texas, after which Judge Reed O’Connor gave no immediate verdict.

Lawyers from 20 of the most conservative states attended the hearing on Wednesday. This is the latest legal attack on former President Obama’s signed health plan. Among the lawyers involved was Attorney General Jeff Sessions who leveraged the Trump administration’s power to apply pressure on key arguments of the legal case.

Two other Attorney Generals pressing the lawsuit include Josh Hawley from Missouri and Patrick Morrisey from West Virginia. Both Attorney Generals are currently in the race for the Senate.

The arguments sustained by the participating lawyers included concerns regarding the future stability of the insurance market as well as rendering Obamacare completely unconstitutional.

According to the lawyers, by repealing the “individual mandate” which required all Americans buy insurance or pay a penalty fee, Congress “severed the very thin thread that held together the Affordable Care Act,” said special counsel Darren McCarty.

Fortune News reported that due to Congress repealing the “individual mandate”, 13 million Americans could find themselves without insurance by 2027.

U.S. District Judge O’Connor has yet to give his ruling after the three-hour hearing. However, he promised he would announce his decision “as quickly as [he] can.”

The Justice Department, however, is pushing against making an immediate injunction that would suspend the enforcement of the current law. According to Justice Department’s Brett Shumate, any immediate injunction would be “a potential for chaos,” as was reported by The Dallas Morning News.

The legal congregation occurred as Supreme Court nominee Brett Kavanaugh underwent his confirmation hearing. When asked how he would rule regarding the popular health care, Kavanaugh cited the “nominee precedent” and declined to answer the question.

Obamacare is currently at the heart of the Democrats’ campaign promises. This is mostly due to the highly unpopular vote that the American Health Act, the GOP’s replacement for Obamacare, received. Sources show the American Health Act is among the most unpopular legislation passed in the last three decades.

The Trump administration has decided not to get involved in the legal case, and instead gave way for 16 Democratic Attorney Generals to lead the legal defense.

This, however, isn’t the first legal battle undergone by The Affordable Care Act. The legislation has survived two Supreme Court rulings and various repeal efforts in Congress to date.