The late Republican Sen. John McCain’s wife, Cindy McCain, has endorsed Joe Biden, not the incumbent President Donald Trump, claiming that the Democratic presidential candidate is the only candidate standing up for U.S. values.

“My husband John lived by a code: country first. We are Republicans, yes, but Americans foremost. There’s only one candidate in this race who stands up for our values as a nation, and that is @JoeBiden,” Cindy McCain tweeted on Tuesday evening, Sept. 22.

The widow has formally given her endorsement to the former vice president after she narrated a video about her husband’s bipartisan friendship with Biden and the strong ties between their two families during the Democratic convention, according to Washington Examiner. A year earlier, McCain said she would not get involved in presidential politics.

In another tweet on Tuesday, McCain mentioned the disagreements that she and her husband had with Biden, but said the Democratic presidential nominee has the character to lead the country.

“Joe and I don’t always agree on the issues, and I know he and John certainly had some passionate arguments, but he is a good and honest man. He will lead us with dignity,” she wrote.

In his response, Biden thanked McCain for her backing, saying that the election is “bigger than any one political party.” 

“Cindy—I’m deeply honored to have your support and your friendship. This election is bigger than any one political party. It requires all of us to come together as one America to restore the soul of the nation,” Biden wrote in a tweet on Tuesday night. “Together, we’ll get it done.”

Earlier on Tuesday, Biden announced at a fundraising event that McCain would back him, saying she had changed her mind after reports surfaced that President Trump denigrated fallen service members, though the president dismissed them as fake news.

President Trump on Tuesday dismissed McCain’s endorsement of Biden, saying that he “hardly” knows her and describing the former vice president as a “lapdog” for her late husband.

“I hardly know Cindy McCain other than having put her on a Committee at her husband’s request. Joe Biden was John McCain’s lapdog. So many BAD decisions on Endless Wars & the V.A., which I brought from a horror show to HIGH APPROVAL. Never a fan of John. Cindy can have Sleepy Joe!,” he tweeted.

John McCain died in 2018 at the age of 81 from glioblastoma, an aggressive form of brain cancer. McCain, a naval aviator, was held as a Vietnam prisoner of war for five years after his plane was shot down in 1967, declining an opportunity for early release offered because of his father. The McCains have clashed with Trump numerous times following the president saying the senator was not a war hero because he was captured.