Dwayne Johnson triggers Trump fans by endorsing Biden, distracts others with super tight top

Dwayne 'The Rock' Johnson has caused a stir by endorsing Joe Biden for US president in an online video - but some viewers were more triggered by what he was wearing.

The WWE legend appeared to upset fans of Celebrity Apprentice star Donald Trump, with many taking to social media to express rage and disappointment.

Johnson introduces his video from a garden while wearing a super tight blue top that accentuates his enormous physique.

"We got to talk about voting," the Rampage star says in the clip, before cutting to a video conversation he had with Biden and vice presidential nominee Kamala Harris.

In the Twitter video, the three then discuss the challenges facing voters in the US, including safety during the COVID-19 pandemic.

Johnson also posted the conversation on Instagram.

"It is a pleasure to see you! I'm a huge fan of everything from Fast & Furious - all of them - to Jumanji, so thank you for your work," Harris tells him in the video.

The Instagram post has racked up nearly 7 million views in 24 hours, while the tweet has 24,000 likes at the time of publishing.

However, many of the comments are critical.

Among the triggered Trump fan messages is a tweet that is being widely shared for its questionable content and incorrect use of apostrophes.

"Unfortunately everyone I know is about to turn our backs to the Rock. We used to be huge fans. My children have already started burning his movie's. Such a sad day to hear rock say this. My teen's took this really hard [sic]," wrote @MichaelaOkla.

Former TV star Kevin Sorbo, an outspoken Trump fan, tweeted that Johnson's endorsement was "shocking and disappointing".

But other social media users only commented on Johnson's top.

"Why even wear the shirt?" questioned @iowaendo.

"Your preamble (tight) shirt is REALLY distracting (are you getting bigger?). Had to watch twice,  thanks for sharing," tweeted @mok_oh.

"I mean this as a compliment, The Rock looks like the Fruit of the Loom grapes," added Mike Scollins.

The 2020 US election takes place on November 3.