Sen. Amy Klobuchar Amy KlobucharSocial media platforms put muscle into National Voter Registration Day Battle lines drawn on precedent in Supreme Court fight Sunday shows - Ruth Bader Ginsburg's death dominates MORE (D-Minn.) on Sunday called it "absurd" that a Texas judge ruled that the Affordable Care Act is unconstitutional and called on Republicans to work with Democrats to improve the health-care law.

“The ruling was absurd. [Supreme Court] Justice [John] Roberts in a conservative court has already ruled that the Affordable Care Act is constitutional," she said on CBS's "Face the Nation."

Klobuchar was referring to U.S. District Court Judge Reed O'Connor's ruling on Friday that ObamaCare is unconstitutional because of the law's individual mandate.

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Lawmakers and legal experts from both parties have said they expect the ruling will be overturned and that the health-care law will not be impacted.

Klobuchar said Sunday that the law will remain intact and added that Congress should be "governing from opportunity and not chaos.”

“We should be working to improve the Affordable Care Act, not just throw it out and set it on fire," she said.

“Right now with an administration in place that seems bound and determined to take away people’s health care, we have to protect the ability of people to even have their health care even exist," she added.

Klobuchar is rumored to be considering a bid for the presidency in 2020. She was at 3 percent in a CNN poll of likely Iowa caucusgoers released Saturday.