Joe Biden once joked Prince Harry was spending too much time with his wife Jill

Watch: Celebrities react to Joe Biden’s presidential win

Since moving to California in March, Prince Harry and Meghan Markle have been vocal in encouraging people to vote, as the US went to the polls for the presidential election.

But now that the winner has been announced, the couple has been quiet, appearing to keep themselves politically neutral.

That could be particularly difficult for them, because the royal couple has some good links with the new president, his wife and the new vice president.

Prince Harry has forged a good friendship with Joe and Jill Biden over the years, and the president-elect and his wife have been to the Invictus Games on several occasions.

One of the key things they have in common is the military, which Harry is passionate about.

Harry, 36, spent 10 years in the British Army, during which time he served in Afghanistan. After he left, the prince created the Invictus Games having been inspired by the Warrior Games in the US, which he saw in 2013.

Read more: The Vice President-elect Kamala Harris is a huge fan of Meghan Markle

He was on a royal tour in the US when he saw the games, when Joe Biden was vice president.

The Bidens’ son Beau, who died in 2015, was a major in the US military, and Dr Jill Biden referred to the bond she shared with “military moms”.

At an event held at the White House during Harry’s 2013 tour, Dr Biden said: “I feel a special bond with other military moms. I'll never forget the day that Beau deployed to Iraq. It was that mixture of pride and concern that military moms know all too well, right? Having Beau overseas was a tough year for our entire family, but it was especially difficult for my daughter-in-law Hallie, my granddaughter Natalie and our grandson Hunter.”

Harry, Dr Biden and Michelle Obama met military families throughout the afternoon at the event.

Dr Biden then attended the 2014 games, and took her husband with her when the games were held in Toronto in 2016.

In fact, Dr Biden and Harry were hanging out so much at one point, that it got the president-elect a little worried.

Read more: 'Megxit' makes shortlist of 2020 word of the year - but pipped to the post by 'lockdown'

When the couple were in the UK in 2014, he joked to The Guardian about reading the British press saying: “My wife was with Prince Harry at the Invictus Games. And I read in the Guardian, or one of them, and it says – I’m paraphrasing – everywhere Prince Harry went, he had this blonde woman on his arm.

“The vice-president’s wife! I’m a little worried here, you know what I mean?”

At the 2016 games, Biden joked that his wife had “spent too much damn time with Prince Harry”.

He also made a speech paying tribute to the military, in which he revealed that his son Beau had something in common with the Royal Family.

Biden said: “We're a military family. Our son Beau was a major. He used to have a saying and he lived it, he’d say ‘never complain and never explain’. And he lived it.”

The phrase is also said to be key in the long-term reign of Queen Elizabeth II.

At the 2017 games, which was a reunion for Obama and Biden, Dr Biden tweeted that she was thrilled to be there with Harry and others.

As well as Harry’s link to Joe and Jill Biden, Meghan has won the support of Kamala Harris, the new vice president-elect.

Harris shared videos of Meghan and offered her support, particularly when Meghan spoke about the death of George Floyd.

In 2019, before Harry and Meghan had stepped back from their senior royal duties, Harris praised Meghan’s emotion in the iconic South Africa interview. When Meghan thanked reporter Tom Bradby for asking if she was okay, and said life in the spotlight while pregnant had been a struggle.

Retweeting the post from biographer, Omid Scobie, Harris said: “Meghan, we are with you.”

In August, Meghan held a chat with Gloria Steinem, long term activist, and the pair praised the idea that Harris could become vice president.

Steinem said: “The heart of the Democratic party has been Black women, actually, and now there is a potential Vice President who is Black and that’s exciting.”

Meghan replied: “I’m so excited to see that kind of representation. You know, for me, being biracial, growing up, whether it was a doll or a person in office, you need to see someone who looks like you in some capacity. As many of us believe, you can only be what you can see.

“And in the absence of that, how can you aspire to something greater than what you see in your own world? I think maybe now we’re starting to break-through in a different way.”

Watch: Will Meghan Markle be in the Crown?

Harry and Meghan kept their pre-election comments largely about democracy and voting itself, and did not endorse one candidate over another.

However their statements were viewed as supportive of the Democrats, in part because Meghan previously called Donald Trump, who was the Republican candidate and running for re-election “divisive”.