The Obama and Clinton Families Remember Former First Lady Nancy Reagan

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Nancy Reagan's "extraordinary" legacy will not be forgotten.

Upon hearing the news that Nancy died on Sunday from congestive heart failure, the Obama and Clinton families issued statements remembering the former First Lady of the United States.

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"Hillary [Clinton] and I were deeply saddened to learn of Nancy Reagan's passing," Bill Clinton said in a statement. "Nancy was an extraordinary woman: a gracious First Lady, proud mother, and devoted wife to President [Ronald] Reagan -- her Ronnie."

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"Her strength of character was legendary, particularly when tested by the attempted assassination of the President and throughout his battle with Alzheimer's," the statement continued. "She leaves a remarkable legacy of good that includes her tireless advocacy for Alzheimer's research and the Foster Grandparent Program. We join all Americans in extending our prayers and condolences to her beloved children and her entire family during this difficult time."

President Barack Obama and First Lady Michelle Obama echoed the Clinton's sentiments, sharing a heartwarming story about how Nancy redefined the FLOTUS role in the White House.

"Nancy Reagan once wrote that nothing could prepare you for living in the White House," the statement read. "She was right, of course. But we had a head start, because we were fortunate to benefit from her proud example, and her warm and generous advice."

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"Our former First Lady redefined the role in her time here," the Obamas explained. "Later, in her long goodbye with President Reagan, she became a voice on behalf of millions of families going through the depleting, aching reality of Alzheimer's, and took on a new role, as advocate, on behalf of treatments that hold the potential and the promise to improve and save lives."

They concluded the message by sending prayers to the family and writing, "We remain grateful for Nancy Reagan's life, thankful for her guidance, and prayerful that she and her beloved husband are together again."

Another former First Lady, Barbara Bush, spoke out on behalf of her and her husband, former President George W. Bush.

"Nancy Reagan was totally devoted to President Reagan, and we take comfort that they will be reunited once more," she told ET in a statement. "George and I send out prayers and condolences to her family."

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Reagan's step-son, Michael Reagan, took to Twitter Sunday morning to confirm the news with a beautiful message that read, "I am saddened by the passing of my step mother Nancy Reagan...She is once again with the man she loved. God Bless... Nancy is where she has always wanted to be with her Ronnie...Now she is at peace..."

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Nancy married Ronald in 1952 and was the second longest-living First Lady, following Bess Truman. Ronald was diagnosed with Alzheimer's disease in 1994 and died in June 2004 at the age of 93.

In addition to Michael, Nancy is survived by her and Ronald's two children, Patti Davis and Ronald Prescott Reagan.