John McCain's wife remembers his unlikely friendship with Joe Biden in emotional video

In the age of Donald Trump, it's hard to comprehend that Democrats or Republicans could ever be friends, but that hasn't always been the case.

In a touching video that aired on the second night of the Democratic National Convention, Cindy McCain narrated a touching video of the friendship between her husband, the late John McCain and the Democratic presidential candidate, Joe Biden.

The pair were of a similar age became friends when Biden was a young senator from Delaware and McCain was a Senate liaison for the Navy, having just been released from a prisoner of war camp in the conflict in Vietnam. McCain was assigned as a personal military aide for Biden for his trips abroad and the two struck up a playful friendship despite their opposing political ideologies. It was common for either to reach across the divide to legislate, an approach which Cindy said "was a style of legislating and leadership that you don't find much anymore."

The three-minute clip ends on a quote from McCain, who died 2018, about his friend:

Thank you for your example on how to remain the same good guy that you were when you first got here, most of all for your friendship. My life and the lives of many have been enriched by it.

The clip has since been widely praised, with many reminiscing about the great example that McCain could often set as a politician.

In 2008, when McCain was the Republican candidate for the presidency and Biden was, of course, Barack Obama's running mate but their friendship clearly continued despite one's victory over the other. Cindy McCain also shared a version of the video, calling it an "honour to accept the invitation from the Biden campaign".

Other prominent Republicans to have voiced their support for Biden have been Colin Powell, the former secretary of state under George W. Bush, former Ohio gov. John Kasich and The Lincoln Project.

Before his death, McCain became a proverbial thorn in the side of Trump, who had openly mocked him for being captured in the Vietnam War. One of his last acts as a senator was to vote against Trump's efforts to repeal the Affordable Care Act.