US President Donald Trump's online store is selling merchandise branded with the slogan "Trump 2028" for the country's next presidential election.

The hats, T-shirts and can coolers are available for purchase despite the fact that the US Constitution prohibits presidents from serving three terms.

Trump, who will be 82 in 2028, has not ruled out running in the next presidential election. He has also said he is considering breaching the constitution in order to do so.

What else do we know about the 'Trump 2028' merchandise?

The US president's son Eric Trump was pictured in a photo on social media on Thursday wearing one of the red caps, which costs $50 (about €44).

The T-shirts, available in navy blue and red, are priced at $36, while the koozies are available for $18.

Product description alongside the newly available apparel says: "The future looks bright! Rewrite the rules."

What does the US Constitution say?

The 22nd Amendment was adopted after Franklin Delano Roosevelt was elected four times.

Roosevelt died at the age of 63, at the beginning of his fourth term, on April 12, 1945.

The amendment, which came into effect in 1951, states that "no person shall be elected to the office of the President more than twice."

While Trump appears set on a third term, amending the country's highest law would require a two-thirds majority in both Congressional chambers.

It would also need to be ratified by at least 38 out of 50 US states, making the prospect seem highly unlikely.

Trump, however, has said there are "methods" to make a third term possible and that he "is not joking" about his intention to run again, but added, "We have a long way to go before we can even think about that." 

Edited by: Sean Sinico