Cindy McCain

Cindy McCain, the widow of the late Republican Senator John McCain, endorses Democratic presidential nominee Joe Biden.

"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," Ms McCain tweeted Tuesday. "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 added.