Former President Donald Trump possibly days away from facing most serious crimes he's ever been charged with

Former United States President Donald Trump could just be days away from facing the most serious crimes he has ever been charged with.

He's received a legal letter warning him he may be charged over attempts to overturn the 2020 election.

January 6, 2021, was a day that continues to haunt the United States, one where five people died and hundreds were injured when a violent mob stormed the US Capitol.

More than a thousand rioters have now been charged for their actions, but one man accused of inciting it, encouraging it, hasn't been charged yet.

"You fight like hell, and if you don't fight like hell, you're not gonna have a country no more," Trump said at the time. 

But Trump has now revealed the special prosecutor, in this case, wrote to him over the weekend.

The "target letter", as it's known, warned the former President could soon be criminally charged. 

Posting on his social media platform Truth Social, Trump wrote: "Horrifying news".

"Joe Biden's Department of Injustice has effectively issued a third indictment and arrest of Joe Biden's number one political opponent."

Former Trump lawyer Jim Shultz said "it shows there is a degree of legal jeopardy coming in the direction of the former President".

The charges Trump could face are unknown but likely to be extremely serious if they do come. 

The White House denies its hand is involved, but Republicans see a conspiracy. 

"President Trump actually went up in the polls and actually surpassed President Biden… so what do they do now? Weaponise government," said Republican House Speaker Kevin McCarthy. 

"If this is the direction America is going in? We are worse than Russia, worse than China," said Republican Congresswoman Marjorie Taylor Greene. 

The former President already faces criminal charges in New York and Miami. 

The looming indictment comes as Trump leads every major poll of Republican candidates for President, by some margin too. 

It's thought his best chance of getting out of his legal troubles is to win back the White House and then pardon himself.

Although it seems nobody's quite sure if that's legal, either.